Question

7. What is the error?

3x + 5 - 2x = 10
+2x +2x = 10
5x + 5 = 10
-5
-5
5x
= 5
5
5
x = 1
A. Adding 2x to 3x
B. Subtracting 5 from both sides
C. Adding 2x to -2x
D. Dividing by 5 on both sides

Answer 1

A. Adding 2x to 3x

Explanation:

3x + 5 - 2x = 10

1x + 5 = 10

x + 5 = 10

Subtract 5 from both sides

x + 5 - 5 = 10-5

x + 0 = 5

x = 5