exam Maths Puzzle Numerical Ability

2/3x - 3/4 = 1/6x + 21/4

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exam Other Question

Simplify the following expression by combining any like terms, Then explain how you combine like terms.

7m - 6t + 2 - 2t + 11m
Can someone please help me on this problem? I am lost on this.

I need to find the constant of variation k

M varies directly with N; M = 144 when N = 8

Thank,
She