Homework Help: algebra

Posted by Anonymous on Tuesday, February 21, 2012 at 8:38am.

Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
18x + 6y = 78
12x + 54y = -48

algebra - drwls, Tuesday, February 21, 2012 at 8:59am
y = 13 - 3x (from the first equation)

Substitute that for y in the second equation, and solve for x.

12x + 54*13 - 162x = -48
150 x = 750

Take it from there.
algebra - deb, Monday, September 17, 2012 at 1:33pm
48 divided by 2(9+3)=
parent needs answer.... i came up up with answer of 2
son has different answer of 288

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