walidatgy walidatgy

13-08-2019
Mathematics

contestada

Solve the system of equations.
7x+10y=36
y=2x+9

x =

y =

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ChoiSungHyun ChoiSungHyun

13-08-2019

Step-by-step explanation:

Substitute the y in the 1st equation with the 2nd equation.

7x + 10(2x + 9) = 36

7x + 20x + 90 = 36

27x + 90 = 36

3x + 10 = 4

3x = -6

x = -2

So now we can find y.

y = 2x + 9 = 2(-2) + 9 = (-4) + 9 = 5.

So x = -2, y = 5.

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Аноним Аноним

13-08-2019

Answer:

Step-by-step explanation:

Answer Link

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