Penyelesaian PLSV dari M-7= -2 .....8= -6+p ......10= y+13 15+a= -4

1 )
M - 7 = -2
M = -2 + 7
M = 5

2 )
8 = -6 + p
8 + 6 = p
14 = p

3 )
10 = y + 13
10 - 13 = y
-3 = y

4 )
15 + a = -4
a = -4 - 15
a = -19