exam Maths Puzzle Numerical Ability

solve using the substitution method.First, solve one eqution for one variable.

3b+2a=2,
-2b+a=8

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exam Other Question

Can you help me on this one...??? I have to divide, leave the answer in exponent form. Assume that all variables in any denominator are nonzero.

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Number 42

x^13 / x^3
this is a fraction help me someone please? i am so lost with this.

Construction. A garden area is 30 ft long and 20 ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft^2, what is the width of the path?