Question 208860
4.) 5x+a=y how solve for a
a = y-5y
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5.) m=6(p+q) how to solve for q 
q = (m/6)-p
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8.) w=3(x+y+z) how to solve for y
y = (w/3)-x-z
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9.) 2w-8y=z how to solve for y
y = (2w-z)/8
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Cheers,
Stan H.