15-38x=-21x-36
17x=51
x=3
y=-63-36=-99
-38x+15=-21x-36
-17x=-51
x=-51:(-17)
x=-3
y=-21*(-3)-36
y=-63-36
y=-99
(-3;-99)
15-38x=-21x-36
17x=51
x=3
y=-63-36=-99
-38x+15=-21x-36
-17x=-51
x=-51:(-17)
x=-3
y=-21*(-3)-36
y=-63-36
y=-99
(-3;-99)