4 x +4x =424
8x =424
x =424/8
х=53
15y- 8y=714
7y=714
y=714/7
у=102
9z + z = 500
10z = 500
z = 500/10
z =50
4 x +4x =424
8x =424
x =424/8
х=53
15y- 8y=714
7y=714
y=714/7
у=102
9z + z = 500
10z = 500
z = 500/10
z =50