Question

8x-30 = 40
6x+ 30 = 20 ​

Answer 1

8x - 30 = 40

8x = 40 + 30

8x = 70

x = 70/8

x = 8.75

6x+ 30 = 20

6x = 20 - 30

6x = -10

x = -10/6

x = - 1,6

Answer 2

Resposta:

$8x - 30 = 40 \\ 8x = 40 + 30 \\ 8x = 70 \\ x = 70 \div 8 \\ x = 8.75$

$6x + 30 = 20 \\ 6x = 20 - 30 \\ 6x = - 10 \\ x = - 10 \div 6 \\ x = - 1.66$