Answer:
I don't know
Step-by-step explanation:
khhikhhjjhhhjjhhhgggggghhhhh
Answer:
Step-by-step explanation:
what year r u in this is soo hard gtg byeee
Step-by-step explanation:
a. (0.60x + 0.70y)- 50 = 10
<=> 0.60x + 0.70y = 60
b. (x+y) = 5(x-y)
x+y=5x-5y
<=> 4x - 6y = 0