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2 Find the value of x if 3x+4=19. 3 Find the value of y when 2y−7=21.

June 1, 2026Mathematics

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Here are the solutions to the problems:

: Find the value of $x$ if $3x + 4 = 19$ .

Subtract 4 from both sides of the equation to isolate the term with $x$ .
$3x + 4 - 4 = 19 - 4$ $3x = 15$
Divide both sides by 3 to solve for $x$ .
$\frac{3x}{3} = \frac{15}{3}$ $x = 5$
The value of $x$ is $\boxed{\text{5}}$ .

: Find the value of $y$ when $2y - 7 = 21$ .
Add 7 to both sides of the equation to isolate the term with $y$ .
$2y - 7 + 7 = 21 + 7$ $2y = 28$
Divide both sides by 2 to solve for $y$ .
$\frac{2y}{2} = \frac{28}{2}$ $y = 14$
The value of $y$ is $\boxed{\text{14}}$ .

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