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Mathematics
Guest
19 December, 09:32
Find the solution of the system of equations.
5x - 2y = - 5
5x + 6y = 35
+3
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1
)
Ann Scott
19 December, 10:39
0
(1,5)
Step-by-step explanation:
Find a way to cancel out a variable, right now the easiest option is x because you only need to make one of the two negative like such:
- (5x-2y=-5)
5x+6y=35
^this becomes
-5x+2y = 5
5x + 6y=35
When you add up the terms, the x cancels out and you're left with
8y = 40
Now you need to solve for y by getting the variable by itself (divide by 8)
y = 5
Now, in order to find x, you need to plug y into one of the original equations
I'm going to choose 5x-2y=-5 simply because it has smaller numbers
So once you plug y in the equation should look like this:
5x-2 (5) = -5
Multiply - 2*5 and your equation should now be
5x-10=-5
Now you need to isolate the variable, first add 10 to both sides
5x-10+10 = - 5+10
5x=5
Divide by 5 to officially solve for x
x=1
The answer should, therefore be (1,5)
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