Solve using substitution y=3x-5 2x+5y=-42

Solution point is (-1,-9)

Step-by-step explanation:

Put the value of y in the first equation into the second equation.

2x + 5(3x - 5) = - 42            Remove the brackets on the left2x + 15x - 25 = - 42            Combine like terms on the left17x - 25 = - 42                     Add 25 to both sides17x - 25 + 25 = - 42 + 25    Do the addition17x = - 17                              Divide by 1717x/17 = -17/17                      Do the divisionx = - 1    

Solve for y

y = 3x - 6x = -1y = 3(-1) - 6y = -3 - 6y = - 9

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