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3 years ago

Solving linear equations

Mathematics

1 answer:

AlexFokin [52]3 years ago

4 0

Answer:

(x, y ) = ( $\frac{1}{2}$ , $\frac{5}{2}$ )

Step-by-step explanation:

given the 2 equations

4x + 2y = 7 → (1)

y = 5x → (2)

Substitute y = 5x into equation (1)

4x + 2(5x) = 7

4x + 10x = 7

14x = 7 ( divide both sides by 14 )

x = $\frac{7}{14}$ = $\frac{1}{2}$

substitute this value into equation (2)

y = 5 × $\frac{1}{2}$ = $\frac{5}{2}$

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Answer:

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$3x^2(3+x)$

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