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Ksenya-84 [330]

3 years ago

10

How to answer this question??? thanks

1 answer:

vesna_86 [32]3 years ago

7 0

$\dfrac{2m}{5}+3=7(4m-3)\ \ \ \ |use\ distributive\ property:a(b-c)=ab-ac\\\\\dfrac{2m}{5}+3=28m-21\ \ \ \ \ |multiply\ both\ sides\ by\ 5\\\\2m+15=140m-105\ \ \ \ |subtract\ 140m\ from\ both\ sides\\\\-138m+15=-105\ \ \ \ |subtract\ 15\ from\ both\ sides\\\\-138m=-120\ \ \ \ |divide\ both\ sides\ by\ (-138)\\\\m=\dfrac{120:6}{138:6}\\\\\boxed{m=\frac{20}{23}}$

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Step-by-step explanation:

step 1

<u>Find the equation of the inequality A</u>

we know that

The solution of the inequality A (dashed line) is the shaded area below the dashed line

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therefore

The equation of the inequality A is $y$

step 2

<u>Find the equation of the inequality B</u>

we know that

The solution of the inequality B (solid line) is the shaded area below the solid line

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