Question

resolva as equacoes
a)×+10=20
b) 2×=280
C) ×-12=75
d) ×+5=3×-3
e) 3×-1=14​

Answer 1

Resposta:

a)x+10=20

x=20-10

×=10

c)x-12=75

x=75+12

x=87

b)x=280/2

x=140

d)x+5=3x-3

x-3x=-3-5

-2x=-8

x=-8/-2

x=4