Solve each of these pairs of simultaneous equations by elimination
1
a + 3b = 5
3a + 2b = 8
2 b + 3C = 7
2b + c=4
3 2d +e=7
3d + 2e = 12
4 3f + g = 11
2f + 3g = 12
5 2h - j = 3
3h + 2i = 8
6 2k - 21 = -2
3k +1 = 5
7 3m - 4n = -14
2m + 2n = 14
8 p +9 = 7
2p - 39 = -6
9 r + 2s = 0
3r-S= -7
10 2t + u = 1
3t - 2u=0
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