Answer:
z = 1
Step-by-step explanation:
15z + 35 = 50
15z = 50 - 35
15z = 15
z = 15/15
15z+35=50
15z=50-35
15z=15
15z÷15=15÷15
z=1
Don
Know
<em>x+y=4</em>
hello :
note : by identity you have x²-y² = (x-y)(x+y)
in this exercice : 2x²-2y² = 2(x²-y²) = 2 (x-y)(x+y)
means : 2 (x-y)(x+y) = 40
but x-y = 5
so : 2(5)(x+y) =40
x+y=40/10
qreg
ergreg
3 Packs
