Question

determine o valor de x nas equaçoes abaixo
a)10x-3=x+39
b)2(x-18)=72
c)x/3+x/2=25
d)x+2/3+ x+4/4=28

Answer 1

a) 10x-x= +39+3
9x= 42
x= 42/9

b) 2x-36=72
2x= 72 + 36
2x= 108
x= 108/2
x= 54

Answer 2

a)10x-3=x+39
10x-x=39+3
11x=42
x=42/11
x=3,8

b)2 (x-18)=72
2x-36=72
2x=72+36
2x=108
x=108/2
x=54

c) x/3+x/2=25 (mmc de 2 e 3=6)
2x/6+3x/6=25
5x=25
x=25/5
x=5