exam Maths Puzzle Numerical Ability

Evaluate.
Find (f+g)(-3) given f(x)=x-4 and g(x)=x-6

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exam Other Question

Please help solve the problem below:

5x - 2y= 4

x + 2y= 8
Use the substitution method to solve the linear system.

y = x - 4
4x+y = 26