Five times the differce between twice a number and 4 is -10

x = 1

General Formulas and Concepts:

Pre-Algebra

Step-by-step explanation:

Step 1: Translate

"Five" = 5

"times" is multiplication

"difference" is subtraction

"twice" means 2 times something

"a number" = x

"is" means equal

"-10" = -10

Step 2: Set up equation

5(2x - 4) = -10

Step 3: Solve for x

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb