Question

Calcule o valor das equações: a) ×+15=30 b)×-12=18 c)6×+×=24 d)8×+6=30 e)10×+4=4×-2

Answer 1

a) x+15=30
x=30-15
x=15
b) x-12=18
x=18-12
x=6
c) x+x= 24
2x= 24 (24/2)
x=12
d)8x+6=30
8x=30-6
8x=24 (24/8)
x=3
e)10x+4=4x-2
10x-4x=-2-4
6x=-6 (6/-6)
x=1