If X ∗ ∗ Y = X + Y - XY, find x when (x ∗ ∗ 2) + (x ∗ ∗ 3) = 68

Question 1 Report

If X $*$ Y = X + Y - XY, find x when (x $*$ 2) + (x $*$ 3) = 68

24

22

-12

-21

Answer Details

x $*$ y = x + y - xy
(x $*$ 2) + (x $*$ 3) = 68
= x + 2 - 2x + x + 3 - 3x
= 86
3x = 63
x = -21

Read lesson note on Solution Of Linear Equations (WAEC)

Solution Of Linear Equations

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