Question

X+x+10=82

X+X+ 165=650

X+2 x=240

Answer 1

Resposta:

x+x+10=82

2x+10=82

2×=82-10

2×=72

×=72÷2

×=36

×+×+165=650

2×+165=650

2×=650-165

2×=485

×=485÷2

×=242,5

×+2×=240

3×=240

×=240÷3

×=80