Created by jackhutcheson
almost 8 years ago


Copied by Oliver Murphy
almost 8 years ago


1. Work out the values of N and M(1) 8m+ 4n = 104(2) 8m + 2n = 1342n = 30n = 15(1) 8m + 4(15) = 1048m  60 = 1048m = 164m = 20.5(2) 8(20.5) + 2(15) = 134164  30 = 104N = 15M = 20.52. Work out the values of A and B(1) 3a + 4b = 14(2) 4a + 2b = 2(2 x2) 8a + 4b = 4(1) 3a + 4b = 145a = 10a = 2(1)3(2) + 4b = 146 + 4b = 144b = 20b = 5(2)4(2) + 2(5) = 28 + 10 = 2A = 2B = 53. Work out the values of X and Y(1) 5x + 2y = 26(2) 8x  4y = 20(! x2) 10x + 4y = 52(2) 8x  4y = 20[Add Equations Together as one is 4 and the other +4]18x = 72x = 4(1)5(4) + 2y = 2620 +2y = 262y = 6y = 3(2)8(4)  4(3) = 2032  12 = 20x = 4y = 3
Substitution Method
1. Solve for X or Y in one equation2. Plug into other and solve3. Use that value to solve for the other variable
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