What is the value of x

Mathematics

1 answer:

barxatty [35]3 years ago

3 0

X = 15

X + 90 = 7x

X = 7x - 90

X - 7x = -90

-6x = 90

Divide both sides by -6

X = 15

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$\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\$

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\\\\\\
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\begin{cases}
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z=-336
\end{cases}\implies -336=k(-7)(4)
\\\\\\
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\\\\\\
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