Question

ITS DUE TMRW!! PLS HELP

What is the value of x in the solution to this system of equations?


5x − 5y = 120


y= −7x + 8


Enter your answer in the box.

Answer 1

x = 24 + y

Explanation:

Move all terms that don't contain x to the right side and solve.

Answer 2

Explanation:

5x − 5y = 120

y= −7x + 8

Use the second equation in the first (eliminates y)

5x − 5(−7x + 8) = 120

5x (+35x -40) = 120

40x -40 = 120

40x = 160

x = 4

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If x = 4:

y= −7x + 8

y= −7*(4) + 8

y= -28 + 8

y = -20

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The solution is (4,-20)