1a) Solve for x and y  x-y=20   2x +3Y=40 Substitution Method 1b) Solve for x and y   x=y   4x +3y =90 Substitution Method 1c) Solve for t and r use elimination method  3r + 3t =9    r + t =9 1d) Solve question 1 using elimination method

Q: Find the solution

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