Answer:
y=1
Step-by-step explanation:
Move 18 to the other side. -3y=-3. y=1.
Answer:
Alexis = 59
Becca = 74
Cindy = 152
Step-by-step explanation:
a + b + c = 285
a = b - 15
c = 2b + 4
16
0.2 = 3.2 gotta watch out for the decimals
First number is (x).
Second number is (2x+7).
Third number is (x-12).
Their sum is (x+2x+7+x-12).
x+2x+7+x-12 =131
You can simplify this equation
4x-5=131,
4x=136
x=136/4=34 (first number),
(2x+7)=34*2+7=75 (second number)
34-x=34-12 =22(third number)
Check: 34+75+22=131
8x3 - 8x + 2x2 - 2
8x3 + 2x2 - 8x - 2