Question
$9x -$ _________ $= -21$ has the solution $(-2).$
✓
Answer
$9x - 3 = -21$ has the solution $(-2).$
Solution:
Let $9x - m = -21$ has the solution $(-2).$
Since, $x = -2$ is the solution of the equation.
$9 \times (-2) - m = -21 -18 + 21 = m m = 3$
Hence, $9x - 3 = -21$ has the solution $(-2).$
$-18 - m = -21$
Solution:
Let $9x - m = -21$ has the solution $(-2).$
Since, $x = -2$ is the solution of the equation.
$9 \times (-2) - m = -21 -18 + 21 = m m = 3$
Hence, $9x - 3 = -21$ has the solution $(-2).$
$-18 - m = -21$
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