Question

simplify 3x-5-x+9 and find the value of the expression if x=3​

Answer 1

Answer:

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$3x - 5 - x + 9 \\ \rightarrow \: 2x + 4 \: \: \: \: \: \: \: \: \: \: \\ \bold{x = 3} \: \bold{(given)} \\ \rightarrow \: 2 \times 3 + 4 \: \: \: \: \: \\ \rightarrow \: 6 + 4 \: \: \: \: \: \: \: \: \: \: \: \: \\ \rightarrow \: 10 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

Answer 2

Given :-

• 3x - 5 - x + 9
• x = 3

To find :-

• The value of the expression

Solution :-

Simplification:

$\implies \bf 3x - 5 - x + 9 \\\\\\ \bf \implies 3x - x + 9 - 5 \\\\\\ \bf \implies 2x + 4 \\\\\\ \dagger \frak { \: Putting \: the \: values \: given \: in \: the \: data} \\ \\ \\ \bf \implies 2(3) + 4 \\\\\\ \implies \bf 6 + 4 \\\\\\ \implies \boxed{\bf 10}$

Therefore, The value of the expression is 10.

Verification:

$\bf \implies 3x - 5 - x + 9 \\ \\ \\ \bf \implies 3(3) - 5 - (3) + 9 \\ \\ \\ \bf \implies 9 - 5 - 3 + 9 \\ \\ \\ \bf \implies 4 - 3 + 9 \\ \\ \\ \bf \implies 1 + 9 \\ \\ \\ \implies \boxed{\bf 10}$

Hence, Verified!

Know more:

$\boxed{\begin{array} {c|c} \sf{ +,- } & \sf{ - } \\ \dfrac{\qquad\qquad}{} & \dfrac{\qquad}{} \\ \sf{- , +} & \sf{ - } \\ \dfrac{\qquad\qquad}{} & \dfrac{\qquad}{} \\ \sf{+,+} & \sf{ + } \\ \dfrac{\qquad\qquad}{} & \dfrac{\qquad }{} \\ \sf{-,-} & \sf{ + }\end{array}}$