How do I solve this?
a. 5
b. 16/3
c. 14
d. 16
2007-07-10 17:32:27 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
a. 5
15 - (a - 2) = 2(a + 1)
15 -a+2 =2a +2
2a+a = 15+2-2
3a =15
a=5
2007-07-10 17:35:28 · answer #1 · answered by sweet n simple 5 · 1⤊ 2⤋
15 - (a - 2) = 2(a + 1)
expand both sides
15 -a+2 =2a +2
add a to both sides and subtract 2 from both sides
2a+a = 15+2-2
tidy up and simplify
3a =15
a=5
therefore the answer is a. 5
2007-07-10 20:32:22 · answer #2 · answered by Anonymous · 0⤊ 0⤋
a. 5
2007-07-10 17:47:22 · answer #3 · answered by Anonymous · 0⤊ 0⤋
15 - a + 2 = 2a + 2
17 = 3a + 2
3a = 15
a = 5
2007-07-10 21:15:56 · answer #4 · answered by Como 7 · 0⤊ 0⤋
15 - (a - 2) = 2(a + 1)
first open the parenthesis
15 - a + 2 = 2a + 2
now add a in both sides
15 - a + 2 + a = 2a + 2 + a
15 + 2 = 3a + 2
now subtract 2 from both sides
15 + 2 - 2= 3a + 2 - 2
15 = 3a
now divide both sides by 3
15 / 3 = 3a / 3
5 = a
therefore a = 5
2007-07-10 17:35:38 · answer #5 · answered by Sam 3 · 1⤊ 2⤋
15 - a + 2 = 2a + 2
-a - 2a = 2 - 2 - 15
-3a = -15 (divide the whole equation with -3)
a = 5
therefore, the answer is a.
2007-07-11 01:39:03 · answer #6 · answered by Anonymous · 0⤊ 0⤋
15 - (a - 2) = 2(a + 1)
Start by distributing.
2007-07-10 17:36:49 · answer #7 · answered by Doug 2 · 0⤊ 0⤋
15 - (a-2) = 2(a+1)
15 - a+2 = 2a+2
17 - a = 2a + 2
17 - 2 = 2a + a
15 = 3a
5 = a
tanan!
2007-07-10 17:37:04 · answer #8 · answered by jman 2 · 1⤊ 0⤋
15 - (a - 2) = 2(a + 1)
15-a+2 = 2a +2
15 = 3a
a= 5
People above me, come on. If you can't get your answer out before other people, then you shouldn't be saving your spots. It isn't fair to the people who do the work before posting.
2007-07-10 17:36:25 · answer #9 · answered by victoria 5 · 1⤊ 1⤋
a = 5
a. 5
2007-07-10 17:38:59 · answer #10 · answered by CPUcate 6 · 0⤊ 0⤋