book Maths Puzzle Numerical Ability

4(2x+7)=108

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book Other Question

directions: solve by graphing.

-3<_x<_2 (-3 is less than or equal to x which is leass than or equal to 2)
y<-2x+1 (y is less than -2x+1)

(i do not understand how to graph the expression square root of 150 is equivalent to?