Question 557195
ok one is already isolated for y
y=10x-8
substitude it                                y=10x-8  this equals to y
                                                   now plug it in
                                             -5x+3y=51(original formulae)
                                          -5x+3(10x-8)=51(after substitution)

                                                   -5x+30x-24=51
                                                      25x-24=51
                                                ADD 24 TO BOTH SIDES
                                                       25X=75
                                                       DIVIDE
                                                        X=3
NOW SUBSTITUTE X ON THE OTHER FORMULAE
Y=10(3)-8
Y=30-8

Y=22
X=3
ANSWER (3,22)