Question

Form an equation of the form $ax+b=c$, where $a$, $b$ and $c$ are constants, such that the solution of the equation is $x=4$.

• A. 2x + 5 = 15
• B. 7x + 2 = 10
• C. 5x + 4 = 16
• D. 3x + 4 = 16

Answer 1

The correct option is D 3x + 4 = 16

$\left(A\right)2x+5=15$

$\Rightarrow$ $2x=10$

$\Rightarrow$ $x=5$

$\left(B\right)7x+2=10$

$\Rightarrow$ $7x=8$

$\Rightarrow$ $x=\frac{8}{7}$

$\left(C\right)5x+4=16$

$\Rightarrow$ $5x=12$

$\Rightarrow$ $x=\frac{12}{5}$

$\left(D\right)3x+4=16$

$\Rightarrow$ $3x=12$

$\Rightarrow$ $x=4$

$\therefore$ In option $D$ we get, $x$ as $4$ so,correct answer is option $D$