Question

1. what value of x will make the expression 5x - 20 equal to

a) 25 ?
b) -50 ?
c) 0 ?
d) 1 ?
e) \\(\frac{1}{2}\\) ?

Explanation:

Part (a)

Step1: Set up the equation

We set \( 5x - 20 = 25 \)

Step2: Add 20 to both sides

\( 5x - 20 + 20 = 25 + 20 \)
\( 5x = 45 \)

Step3: Divide both sides by 5

\( x=\frac{45}{5}=9 \)

Step1: Set up the equation

We set \( 5x - 20=- 50 \)

Step2: Add 20 to both sides

\( 5x-20 + 20=-50 + 20 \)
\( 5x=-30 \)

Step3: Divide both sides by 5

\( x=\frac{-30}{5}=-6 \)

Step1: Set up the equation

We set \( 5x - 20 = 0 \)

Step2: Add 20 to both sides

\( 5x-20 + 20=0 + 20 \)
\( 5x = 20 \)

Step3: Divide both sides by 5

\( x=\frac{20}{5} = 4 \)

Answer:

\( x = 9 \)

Part (b)