Question

a)18x - 43 = 65
b) 23x - 16 = 14 - 17x
c) 10y - 5 (1 + y) = 3 (2y - 2) - 20

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Answer 1

a)

18x-43=65

18x=65+43

18x=108

x=108/18

x=6

b)

23x-16=14-17x

23x+17x=14+16

40x=30

x=30/40

x=0,75

c)

10y-5(1+y)=3(2y-2)-20

10y-5-5y=6y-6-20

10y-5y-6y=-6-20+5

-1y=-26+5

-1y=-21

y=-21/-1

y=21