Question

determine o valor de x
a)3x+7=8
b)X/3-4=8
C)5x-5=0
d)2x-7=x+10
e)X+2/3=x-1/5
f)3(x+6)=40​

Answer 1

a) 3x+7= 8

3x=8-7

x = 1/3

b) x/3-4 = 8

x/3 = 12

x = 3.12 = 36

c) 5x-5 =0

5x=5

x = 1

d) 2x-7 = x+10

2x-x = 10+7

x = 17

e) x+2/3 = x-1/5

x-x = -1/5-2/3

0 = -7/15 impossível

f) 3(x+6)=40

3x+18=40

3x= 40-18

x= 22/3

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