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Question

What is the value of the unknown in the equation:   [4 MARKS]

(i) 2x+4=10

(ii) 11x7=5(x+7)

(iii) 7m+192=13

(iv)  2y+52=372


Solution

Sub-parts : 1 Mark each

(i) 2x+4=10

 2x=104

2x=6

x=62=3


(ii) 11x7=5(x+7)

11x7=5x+35

11x5x=35+7

6x=42

x=426=7


(iii) 7m+192=13

      7m=13192

      7m=26192

      7m=72

      m=72×7

      m=12


(iv)  2y+52=372

       2y=37252

       2y=3752

       2y=322

       y=324

       y=8

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