4x-y=17, -2x+3y=-26 systems of equations by substitution

x=2.5

y= -7

Step-by-step explanation:

1.)make y the subject of any equation

4x-y=17

-y=17 -4x

y = -17 + 4x

2.)substitute it in the next equation

-2x + 3(-17 + 4x)= -26

-2x -51 + 12x = -26

-2x + 12x - 51= -26

10x -51= -26

10x = 25

x = 2.5

3.) substitute the x- value into any equation

4x -y = 17

4(2.5)- y = 17

10 - y =17

-y = 7

y = -7

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step-by-step explanation:

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step-by-step explanation:

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