X = 3y - 2

x = - 7y + 8

x = - 9.5

y = - 2.5

Step-by-step explanation:

to evaluate this linear system of equation, we would say that

let

x = 3y - 2 ... equation 1

x = - 7y + 8 ... equation 2

substitute equation 2 into equation 1

3y - 2 = 7y + 8

collect the like terms

3y - 2 - 8 = 7y

-10 = 7y - 3y

-10 = 4y

divide both sides by 4

-10/4 = 4y/4

-2.5 = y

y = - 2.5

put the value value of y into equation 1

x = 3y - 2 ... equation 1

x = 3 (-2.5) - 2

x = - 75 - 2

x = - 9.5

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