Question

Por favor me ajudem , eu agradeço

Answer 1

a) 3x + 2x = 90
5x = 90
x = 90/5
x = 18

b) 5x+2x+40+3x+10 = 180
5x+2x+3x = 180-40-10
10x = 130
x = 130/10
x = 13

c) 2x + 3x + 2x+40 = 180
7x = 180 - 40
7x = 140
x = 140/7
x = 20