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Mathematics
Donte Arias
7 October, 20:17
20 = r + 11
Solve the equation.
+3
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2
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Shamar Mcdowell
7 October, 23:06
0
r=9
Step-by-step explanation:
Step 1: Flip the equation
r + 11 = 20
Step 2: Subtract 11 from both sides
r + 11 - 11 = 20 - 11
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Davin Waller
7 October, 23:59
0
Answer: r = 9
Step-by-step explanation:
Simplifying
20 = r + 11
Reorder the terms:
20 = 11 + r
Solving
20 = 11 + r
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-1r' to each side of the equation.
20 + - 1r = 11 + r + - 1r
Combine like terms: r + - 1r = 0
20 + - 1r = 11 + 0
20 + - 1r = 11
Add '-20' to each side of the equation.
20 + - 20 + - 1r = 11 + - 20
Combine like terms: 20 + - 20 = 0
0 + - 1r = 11 + - 20
-1r = 11 + - 20
Combine like terms: 11 + - 20 = - 9
-1r = - 9
Divide each side by '-1'.
r = 9
Simplifying
r = 9
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