Question

A. 3x-7=2x+5
B. 7x+8=4x-10
C. 4x-15=-2x+3​

Answer 1

Resposta:

A-

$3x - 7 = 2x + 5 \\ 3x - 2x = 5 + 7 \\ x = 12$

B-

$7x + 8 = 4x - 10 \\ 7x - 4x = - 10 - 8 \\ 3x = - 18 \\ x = - 18 \div 3 \\ x = - 6$

C-

$4x - 15 = - 2x + 3 \\ 4x + 2x = 3 + 15 \\ 6x = 18 \\ x = 18 \div 6 \\ x = 3$