Question

answer and verify
(1) 3 (x + 7) = 18​

Answer 1

• 3 (X+7)=18
• 3x=18-21
• 3x=-3
• x=-3/3= -1

Answer 2

$\huge \colorbox{red}{given}$

$3(x + 7) = 18$

$\huge \colorbox{green}{solution}$

$3(x + 7) = 18 \\ \\ 3x + 21 = 18 \\ \\ 3x = 18 - 21 \\ \\ 3x = - 3 \\ \\ x = \frac{ - 3}{3} \\ \\ x = - 1$

$\huge \bf \fcolorbox{green}{gold}{lets \: verify}$

$\bf \fcolorbox{red}{dsa}{now \: at \: x = - 1}$

$3(x + 7) = 18 \\ \\ 3( - 1) + 21 = 18 \\ \\ - 3 + 21 = 18 \\ \\ 18 = 18$

$\huge \bf \fcolorbox{gold}{dsa}{LHS = ŔHS}$

$\huge \bf \fcolorbox{green}{dsa}{hence \: \: verified}$

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