book Maths Puzzle Numerical Ability

2/3 (3/2) = 1
7x + 2y= 2y + 7x

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book Other Question

find the exact value, leaving the answer in a proper form of tan 240 degrees. Draw a digram to illustrate the following please
a.multiplyu by 4 add5
b.add 1 multibly by 3
c. add5 multiply by4
d. multiply by 3 add 1