Substituting x-4=y and -5y+8x=29

Mathematics

2 answers:

ira [324]2 years ago

5 0

-5(x-4) +8x=29
-5x+20+8x=29
3x+20=29
3x=9
X=3

Marianna [84]2 years ago

3 0

The answer is x=3. Work shown in the photo above!

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2 years ago

2p/9 + 5p/18 - 5/6 = 2/3 + p/12 + 1/6

mezya [45]

$\frac{2p}{9}+\frac{5p}{18}-\frac{5}{6}=\frac{2}{3}+\frac{p}{12}+\frac{1}{6}\ \ \ |Multiply\ by\ 36\\\\
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8p+10p-30=24+3p+6\\\\
18p-30=3p+30\ \ \ |Subtract\ 3p\\\\
15p-30=30\ \ \ |Add\ 30\\\\
15p=60\ \ \ |Divide\ by\ 15\\\\
\boxed{p=4}$