Question

a)4x-7=8×-2
b)3×-2=4×+9
c)9×+9+3×=15
D)16×-2=12×+3​

Answer 1

→ Cálculo :

A) 4x - 7 = 8x - 2

4x - 8x = - 2 + 7

-4x = 5

x = -5/4

B) 3x - 2 = 4x + 9

3x - 4x = 9 + 2

-x = 11

x = -11

C) 9x + 9 + 3x = 15

12x + 9 = 15

12x = 15 - 9

12x = 6

x = 6/12

Reduza a divisão com o número 6.

x = 6 ÷ 6 / 12 ÷ 6

x = 1/2

D) 16x - 2 = 12x + 3​

16x - 12x = 3 + 2

4x = 5

x = 5/4