Question

.Calcule o valor das equações a seguir: a) 7x – 33 = – 12 b) 2x – 2 = 12 – 5x

Answer 1

A)
7x-33= -12
7x=33-12
7x=21
x=21 ÷ 7
x= 3

B)
2x-2= 12-5x
2x+5x=12+2
7x=14
x=14 ÷7
x= 2

Answer 2

a) 7x -33 = -12

7x = -12 +33

7x = 21

x = 21

x = 21/7

x = 3

b) 2x -2 = 12 -5x

2x +5x = 12 +2

7x = 14

x = 14/7

x = 2