Question

equação do 1 grau

10 × - 12 + 10 = 18 - 20

E

13 × - 23 - 45 = - 7 × + - 12

Answer 1

10×-12+10=18-20
10×=18-20+12-10
10×=0
×=0-10
×=-10


13×-23-45=-7×-12
13×+7×=-12+23+45
20×=80
×=80/20
×=4