Question

Solve the following equations:
(a) 10p = 100
(b) 10p + 10 = 100
(c)$\frac{p}{4}$=5
(d) $\frac{-p}{3}$=5
(e)$\frac{3p}{4}$=6
(f)3s=-9
(g)3s+12=0
(h)3s=0
(i)2q=6
(j)2q-6=0
(k)2q+6=0
(l)2q+6=12

Answer 1

(a) 10p = 100
\Rightarrow$$\frac{10p}{10}=\frac{100}{10}[Dividing both sides by 10]
\Rightarrow$$p=10

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(b) 10p + 10 = 100
$\Rightarrow$10p + 10-10= 100-10
\Rightarrow$$10p=90
\Rightarrow$$\frac{10p}{10}=\frac{90}{10}

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(c) $\frac{p}{4}$=5
$\frac{p}{4}\times 4=5\times 4$
$p=20$

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(d) $\frac{-p}{3}$=5
$\frac{-p}{3}\times -3$= 5$\times-3$
$p=-15$

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(e) $\frac{3p}{4}$=6
$\frac{3p}{4}\times 4$=6$\times 4$
$3p=24$
$\frac{3p}{3}=\frac{24}{3}$