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So I've been working on solving this system by addition/subtraction and I just can't get the right answer. Her is the system of equations I was given to solve by add/sub: 3x – y = –12 x + 2y = –18
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Solve this system 10x+2y=7,y=5x+3 by addition or substitution. If a unique solution does not exist state if the system is dependent or inconsistent.
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i need help solving the system by addition. 5x7y=5 x+3y=1 this is what i think but i am not sure 3y=x+1 y= (1/3)x+(1/3) 5x  7 (1/3x + 1/3) = 5 5x+2.3333331x2.3333331=5 7.3333331x2.3333331=5 7.3333331x=7.3333331 x=1 x+3y=1
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