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2 years ago

7

(3x-70) (3y+40) 120 x

1 answer:

Andru [333]2 years ago

8 0

(3y+40)+(3x-70)=180

3y+3x-30=180
3y+3x=210
3(y+x)=210
y+x=70
x=70-y

meanwhile 180-120=x therefore x=60
therefore
60=70-y y=10
so x=60 y=10

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