4-5f=64 subtract 4 on both sides to isolate 5f. 4-4 cancels out and 64-4 is 60
-4 -4
-5f=60 divide both sides by -5 to isolate f. -5/-5 cancels out and 60/5 is 12
/-5 /5
f=12 now f is isolated and the solution on the other side is 12!
You should now how to solve equations by now unless your mentally retarded btw.
16
4(64 - 125b) or -4(125b - 64)
18.
x3 + 4x2 - 16x - 64 = (x + 4)(x + 4)(x - 4).
it is minus 4 (-4) the right answer
If that equals zero, then x = 4
(x - 4)(x^2 + 4x + 16)
16
16 gallons= 64 qt 8 pints=4 quarts 64+6=70 70-4=66 qts
(-3)-(4)=(-3)+4=1 Minus times minus equals plus. The reason for this we need not discuss.
4(64 - 125b) or -4(125b - 64)
4x16=64 that is the final answer
x3 + 4x2 - 16x - 64 = (x + 4)(x + 4)(x - 4).
18.
-7
What minus 6 equals 12 is 18
-2