Sign In
Ask Question
Mathematics
Atticus
10 September, 07:08
a + b + c = 10
a + b - c = 3
find the value of
a + b + 3c
+4
Answers (
1
)
Ivan Fields
10 September, 10:01
0
Ok if you look at the first to equations carefully you will see that 2 things have changed between the 2. the "+c" is now "-c" and the "10" is now "3"
if we think about it you will see that c=7. well how do we know. when c or 7 was taken away from the problem it left you with 3
so that means a+b=3
we dont need to know what the exat value of a or b is.
so a+b + 3c
(3) + 3 (7)
3 + 21
24
a+b+3c=24
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Get an answer to your question ✅
“a + b + c = 10 a + b - c = 3 find the value of a + b + 3c ...”
in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
Ken paid $12 for two magazines. The cost of each magazine was a multiple of $3 what are the possible prices of the magazine?
Answers (2)
Gavin drives at a speed of 70 miles per hour how long will it take to drive 245 miles
Answers (2)
2,165.413 to the hundredth
Answers (2)
What's the absolute value of - 2/3 in rational number
Answers (1)
What is the median for the set of data? Ages Stem Leaves 5 0, 4, 6 6 0, 2, 3, 4, 8, 8, 9 7 0, 2, 3, 4, 4, 4, 8, 9 8 4, 5, 6, 8 5|0 = 50 years old 70 71 72 74
Answers (1)
New Questions in Mathematics
Kelly has a ribbon that is 60 inches long she cuts at 40% of ribbon for an art project while working on the project she decided she only needs 35% of the pieces she cut off how much of the ribbon does Kelly end up using in a project
Answers (1)
Which expression is equivalent to x (y+z) ? a) xyz b) x+y+z c) xy+z d) xy+xz
Answers (2)
8.92*10^9 in standard notation
Answers (1)
On a test Matilda answered 12 out of the first 15 correctly. If this rate continues how many of the next 25 problems will she answer correctly?
Answers (1)
Which expression shows the value of a $10,000 investment that has lost 1.2% if it's value for five years In a row
Answers (1)
Home
»
Mathematics
» a + b + c = 10 a + b - c = 3 find the value of a + b + 3c
Sign In
Sign Up
Forgot Password?