Question

resolva as equações:

A) 2x + 15 -21 + x =27
B)75 + 3x + x = 150 - 75
C) 9x + 85 - 3x = -35
D)2x + 10 - 35 + 3x = -155
E) 16 + 3x + x - 24 = -80
​

Answer 1

a)2x+15-21+x= 27
2x+x=27-15
3x= 12
x=12: 3 (fração aqui)
x= 4

b)75+3x+x=150-75
3x+x=150-75-75
4x =0
x = 0: 4
X = 0

C ) 9x+85-3x= -35
9x -3x = -35-85
12x= -120
x= -120: 12
x=-10

D)2x+10-35+3x =-155
2x+3x=-155-10+35
5x= -130
x=-26

e) 16+3x+x-24= -80
3x+x = -80-16+24
4x = -72
x= -72: 4
X= -18