PLEASE HELP!!!! Solve the system, using substitution. One point for correct steps, one point for correct ordered pair, (a,b).
a + b = 4 and 2a + 3b = 11
i tried to solve for a but ended up with 1/-5 i dont think thats right....

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a+b=4
2a+3b=11
a=4-b
2(4-b)+3b=11 (substituing a as found)
a=4-b
8+b=11
a=4-b
b=3
so, a=1 and b=3

a=4-b
2(4-b)+3b=11
i get that but how did ypu go from that to a=4-b
8+b=11

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