Question

me ajude a resolver as equações de 1°Grau​

Answer 1

01) 2•x+5=91
2X=91-5
2X=86
X=86/2
X=43
02) 3x-4=23
3x=23+4
3x=27
X=27/3
X=9
03) X+2X= 150
3X=150
X=150/3
X=50
04) X+28=3x
X-3x=-28
-2X=-28 •(-1)
2X=28
X=28/2
X=14
05) 3X-10=X+70
3x-x=70+10
2X=80
X=80/2
X=40
06) 4x+x=85
5x=85
X=85/5
x=17 motos
68 carros

07) x + 5 + x = 43
x + x = 43 - 5
2x = 38
x= 38 / 2  
x = 19