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2006-11-07 12:22:11 · 7 answers · asked by Jesus s 1 in Science & Mathematics ➔ Mathematics
9+11a= -5a+21
9+16a=21
16a=12
a=3/4
2006-11-07 12:24:50 · answer #1 · answered by 7 · 0⤊ 0⤋
9+11a = -5a +21
16a+9 = 21
16a =12
a =12/16
= 3/4 (simplified)
2006-11-07 19:46:42 · answer #2 · answered by CuRioUs. 2 · 0⤊ 0⤋
9+11a=-5a+12
-9 -9
11a=-5a+12
+5a +5a
16a=12
/16 /16
a=12/16
a=3/4
2006-11-07 12:28:25 · answer #3 · answered by tictac_lvr 2 · 0⤊ 0⤋
9 + 11a = -5a + 21
9 + 16a= 21
16a = 12
a= 3/4 (.75)
2006-11-07 12:24:44 · answer #4 · answered by Liz♥ 4 · 0⤊ 0⤋
9+11a=-5a+21
5a+11a=-9 + 21
16a=12
a=.75 or 3/4 (same thing)
2006-11-07 12:26:44 · answer #5 · answered by D.Z. Carter 5 · 0⤊ 0⤋
adding -9
11a=-5a+12
addind 5a
16a=12
dividing by 16
a=12/16
=3/4
2006-11-07 12:28:14 · answer #6 · answered by raj 7 · 0⤊ 0⤋
20a=26a
2006-11-07 12:28:08 · answer #7 · answered by Mel 2 · 0⤊ 0⤋