Question

Qual o valor de M?
(2,5-M)×7,8+ 6,1=10

Answer 1

(2,5-M)×7,8+6,1=10
(19,5)-(7,8M)+6,1=10
-7,8M=10-(19,5)-(6,1)
-7,8M=-15,6
M=(-15,6)/(-7,8)
M=2

Resposta: M=2