Question

resolva as equações:

a) x-3=19
b) x+7=10
c) 2x-4=12
d) -10+2x=40

Answer 1

Oi...

a) x - 3 = 19

x = 19 + 3

x = 22

b) x + 7 = 10

x = 10 - 7

x =  3

c) 2x - 4 = 12

2x = 12 + 4

2x = 16

x = 16/2

x = 8

d) - 10 + 2x = 40

2x = 40 + 10

2x = 50

x = 50 ÷ 2

x = 25

Espero ter ajudado