Question

qual a resposta da conta 10x-9=x-72=

Answer 1

10x-9=x-72
10x-x=-72+9
9x=-63
x=-63/9
x=-7
espero ter ajudado

Answer 2

10x - 9 = x - 72

10x - x = - 72 + 9

9x = -63

x = -63/9

x = -7

S = {x∈IR/x=-7}