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Solve equation 7x + 14 = 21 to find value of x.(a) x = 1(b) x =-1(c) x = 2(d) x = -2I got this question in an online interview.I would like to ask this question from Solving Linear Equations with Variables on One Side and Number on the Other topic in portion Linear Equations in One Variable of Mathematics – Class 8

Answer»

Right option is (a) x = 1

To explain I would SAY: 7x + 14 = 21

Step 1: Solving the equation, we take constant 14 on the RHS MAKING 7x = 7

Step 2: DIVIDING LHS and RHS with 7 we GET x = 1.



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