dannyboy1972 dannyboy1972

01-12-2016
Mathematics

contestada

a+b=2x-2 and a-b=4x-8 find a and b

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charstar charstar

01-12-2016

a+b=2x-2
a-b=4x-8
a=6x-10
a=4x-8+b
6x-10=4x-8+b
2x-10=b-8
2x+2=b
2x-2=b-4
a+b=b-4
a=-4
-4=6x-10
6=6x
x=1
2-2=b-4
0=b-4
4=b

a=-4
b=4

Hope this helps :)

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