Question

This question is confusing. Please help me!

Answer 1

x = 18

Explanation:

Plug in 4x-7 for b and 2x+3 for a in 3b = 5a

3(4x-7) = 5(2x +3)

Solve for x:

12x-21 = 10x+15

2x = 36

x=18

Answer 2

x = 18

Explanation:

Given:

• a = 2x +3
• b = 4x - 7

Finding x for which 3b = 5a:

• 3b = 5a

• 3(4x - 7) = 5(2x + 3)
• 12x - 21 = 10x + 15
• 12x - 10x = 15 + 21
• 2x = 36
• x = 36/2
• x = 18