80%= .80
of means times
decrease means to subtract
75 x ,80= 60 students lost
75-60= 15 students left
hope this helps
2x=5y
x-y=111
x=111+y
so 2x=5y is
2(111+y)=5y
222+2y=5y
2y-5y=-222
-3y=-222 (divide by -3 both sides of the equation)
y=-222/(-3)= 74
x=111+y = 111 +74 = 185
so the first number is 185 and the second is 74
Answer:
7 years older than jason
Step-by-step explanation:
-10 + 3 = -7 is an equation
7 years older than jason cannot be converted into an equation bc there's not enough info, so it is not.
x + 7 = 20 is an equation
three times a number is twelve, so 3x = 12, which is an equation
Answer:48
Step-by-step explanation:
6*8 shows the c9nbonations of just then 2 together