Question

Resolva as equações
a) 2y+7=y-8
b) 4y+7=y-8
c) 3-7(-2z)=5-(z-9
d) 4z+8=3z-5
e) 3z-4=z+1
f) 9z-11=-2
g) 5z-1=8z+5

Answer 1

Resposta:

Explicação passo-a-passo:

a) 2y-y=-8-7

y=-15

b) 4y-y=-8-7

3y= -15

y = -15/3

y= -5

c) 3+14z=5-z+9

14z+z=5+9-3

15z=11

z=11/15

d) 4z-3z=-5-8

z= -13

e) 3z-z = 1+4

2z = 5

z = 5/2

f) 9z = -2+11

9z = 9

z = 9/9

z = 1

g) 5z-8z = 5 + 1

-3z = 6

z = 6/-3

z = -2