1){ 4x+9y-9=0 2) { 1,5x-1,2y+18=0
{ 5x-6y-17=0 {0,7x-1,8y+14,6=0
Помогите!!!

4x+9y-9=0 
5x-6y-17=0

x=-9/4y+9/4
5x-6y-17=0

5(-9/4y+9/4)-6y-17=0
y=-1/3
x=-/4*(-1/3)+9/4
x=3
y=-1/3


1,5x-1,2y+18=0
0,7x-1,8y+14,6=0

x=2y/25-6/5
0.7x-1.8y+14.6=0

0.7(2y/25-6/5)-1.8y+14.6=0

y=860/109

x=2*860/109 /25-6/5

x=-62/109

x=-62/100
y=860/109