Gujarat BoardEnglish MediumSTD 7MATHSSimple Equations1 Mark
MCQ
The solution of the equation $3x + 7 = -20$ is:
A
$\frac{17}{7}$
✓
$-9$
C
$9$
D
$\frac{13}{3}$
✓
Answer
Correct option: B.
$-9$
Given equation is $3x + 7 = -20$
$\Rightarrow 3x = -20 - 7 [$transposing $7$ to $RHS]$
$\Rightarrow 3x = -27$
On dividing the above equation by $3,$ we get
$x = -9$
Hence, the solution of the given equation is $-9.$
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