Cevap:
1) 7+12=9+x ten 19=9+x ise x=10......cvp C
2)3x+y=3x+6 dan y=6......cvp C
3)13+A=18 den A=5.......cvp B
4) cvp D 5x*3=3x*5
5) cvp A 9 yazılır diğerleri 3 olur
6) 4x+5=2x-3+y
y=2x+8 olur.... Cvp A
7) 2xy+4y+3=xy+1+a
a=xy+4y+2.......cvp D
8) x+2y=y+3x
y=2x olur
Cvp C