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