4x + 8 = 20
3 answers
To solve the equation \( 4x + 8 = 20 \), follow these steps:
Subtract 8 from both sides: \[ 4x + 8 - 8 = 20 - 8 \] This simplifies to: \[ 4x = 12 \]
Divide both sides by 4: \[ \frac{4x}{4} = \frac{12}{4} \] This simplifies to: \[ x = 3 \]
Therefore, the solution is: \[ x = 3 \]
To solve the equation \( \frac{x}{9} - 3 = 7 \), follow these steps:
Add 3 to both sides: \[ \frac{x}{9} - 3 + 3 = 7 + 3 \] This simplifies to: \[ \frac{x}{9} = 10 \]
Multiply both sides by 9 to isolate \( x \): \[ 9 \cdot \frac{x}{9} = 10 \cdot 9 \] This simplifies to: \[ x = 90 \]
Therefore, the solution is: \[ x = 90 \]
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