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3x+2y=5, 2x+3y=5 then x+y=? |
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Answer» 3x + 2y = 5......... (1)2x + 3y = 5..........(2) Multiply eq(1) by 2 and eq(2) by 3 6x + 4y = 10........(3)6x + 9y = 15........(4) Subtract eq(3) from eq(4)5y = 5y = 5/5 = 1 Put value of y = 1 in eq(1)3x + 2*1 = 53x = 5 - 23x = 3x = 3/3 = 1 Therefore,x + y = 1 + 1 = 2 3x+2y=5........(1)2x+3y=5........(2) multiply eq1 by 2 and eq 2 by 3 6x+4y=10........(3)6x+9y=15........(4) substract eq3 from eq4 5y=5y=1 put the value of y in any eq we get x=1 then x+y=1+1=2 |
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