Answer:
a. f(-4) = 3x+5
-3x = 5 +4
-3x = 9. (divide both sides with -3)
x = -3
b. f(0) = 3x +5
-3x = 5 - 0
-3x = 5 (divide both sides with -3)
x = 5/-3
c. f(6) = 3x + 5
-3x = 5 - 6
-3x = -1
x = ⅓
CHECKING:
a. f(-4) = 3(-3) + 5
-4 = -9 + 5
-4 = -4 ✓
b. f(0) = 3(5/-3) +5
0 = (15/ -3 ) + 5
0 = -5 + 5
0 = 0 ✓
c. f(6) = 3(⅓) + 5
6 = 1 + 5
6 = 6 ✓
Step-by-step explanation:
Substitute the given to the equation.
Isolate the variable and the constants.
To eliminate the number in the variable (i forgot the name; e.g. -3x)
Just divide the number to both sides.
To check whether the result is correct, substitute it to the equation.
[sana makahelp]
