Question

a) 10x - 90 + x + x +45 - 3
( ) 12x - 48
( ) 12x - 138
( ) 8x-48
( ) 8x -138
me ajudem pfv​

Answer 1

$12x - 48$

Explicação passo-a-passo:

$10x - 90 + x + x + 45 - 3 \\ 10x + x + x = 90 - 45 + 3 \\ 12x = 48 \\ 12x - 48$