Question

4x - 7 = -3x

What is the answer?

Answer 1

Answer: x= 7

Explanation:

4x-7= -3x First add -3x on both sides

+3x +3x

7x -7 = 0

+7 +7 add 7 to both sides

7x = 7

x = 1 divide both sides by 7

Answer 2

x = 1

Explanation:

1. Add 3x to both sides of the problem

• 4x + 3x - 7 = -3x + 3x
• -3x + 3x cancels out and leaves us with zero
• 7x - 7 = 0

2. Add 7 to both sides

• 7x (- 7 + 7) = 0 + 7
• -7 + 7 cancels out
• 7x = 7

3. Divide both sides by 7

• 7x/7 = 7/7
• x = 1

To make sure our answer is correct we can plug in 1 to x in the problem

• 4(1) - 7 = -3(1)
• 4 - 7 = -3 : True