1+2(a+1)=3(a+4)
2007-11-04 12:29:03 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1+2a+2 =3a+12
1+2-12 =3a-2a
-9 = a
2007-11-04 12:33:00 · answer #1 · answered by ironduke8159 7 · 1⤊ 0⤋
I guess you wanna know what a is?
1 + 2a +2 = 3a + 12
a = -9
2007-11-04 20:33:17 · answer #2 · answered by Anonymous · 0⤊ 0⤋
1 + 2(a + 1) = 3(a + 4)
distibute
1 + 2a + 2 = 3a + 12
simplify
3 + 2a = 3a + 12
get like terms on one side
2a = 3a + 12 - 3
simplify
2a = 3a +9
move like terms
2a - 3a = +9
simplify
-1a = 9
simplify
-a = 9
chsnge the signs respectivly
a = -9
********A = -9********
I hope this suffices though it would have been better to do it by hand to show the moving like terms i hope this helps you
2007-11-04 20:52:24 · answer #3 · answered by maxmillion132000 2 · 0⤊ 0⤋
1+2(a+1)=3(a+4)
1+(2*a)+(2*1)=(3*a)+(3*4)
1+2a+2=3a+12
2a+3=3a+12
-(3a+12)=-(3a+12)
-a-9=0
-a=9
a=-9
2007-11-04 20:40:34 · answer #4 · answered by katie99_2006 1 · 0⤊ 0⤋