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Is x=7 a solution to the equation 3x + 4 = 20?

April 3, 2026Mathematics

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Step-by-step solution

5 steps

Here's how to check if $x=7$ is a solution to the equation $3x + 4 = 20$ :

Write the given equation.
$3x + 4 = 20$
Substitute $x=7$ into the equation.
$3(7) + 4 = 20$
Perform the multiplication.
$21 + 4 = 20$
Perform the addition.
$25 = 20$
Compare both sides of the equation.
Since $25 \neq 20$ , the value $x=7$ is not a solution to the equation $3x + 4 = 20$ .

The correct answer is:
❌ Incorrect. $x=7$ is not a solution to the equation $3x + 4 = 20$ .

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