Solve the following simultaneous equation
(1) 3a + 3b = 26; a + 5b = 22
(3) 2x - 3y = 9: 2x + y = 13
(5) 5x + 2y = -3; x + 5y = 4
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Answer:
(1) 3a + 3b = 26; a = 22-5b
3(22-5b) + 3b = 26
66- 15b +3b = 26
66-12b = 26
-12b = 26-66
-12b = -40
b = 10/3
a = 22-5b
a= 22-5(10/3)
a = 22-50/3
a = 16/3
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