3 years ago

20 - 4b/8= 18 another one :)

Mathematics

1 answer:

Crazy boy [7]3 years ago

5 0

multiply by 8 on both sides

(20)8 - 8(4b/8) = (18)8

160 - 4b = 144

subtract 160 on both sides

160 - 160 - 4b = 144 - 160

-4b = -16

divide by -4 on both sides

-4b/-4 = -16/-4

b = 4

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