Question

Solve for the variable: 15 - 4.2A < 3.9

Answer 1

Answer:

a=37/14

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Step-by-step explanation:

$\mathrm{Multiply\:both\:sides\:by\:}10$

$15\cdot \:10-4.2a\cdot \:10$

$\mathrm{Refine}$

$150-42a$

$\mathrm{Subtract\:}150\mathrm{\:from\:both\:sides}$

$\mathrm{Simplify}$

$-42a$

$\mathrm{Multiply\:both\:sides\:by\:-1\:\left(reverse\:the\:inequality\right)}$

$\left(-42a\right)\left(-1\right)>\left(-111\right)\left(-1\right)$

$\mathrm{Simplify}$

$42a>111$

$\mathrm{Divide\:both\:sides\:by\:}42$

$\frac{42a}{42}>\frac{111}{42}$

$\mathrm{Simplify}$

$a>\frac{37}{14}$