2007-06-22 05:25:24 · 6 answers · asked by LASHANDA F 1 in Science & Mathematics ➔ Mathematics
21x+28 = 16x +40+13
5x = 25
x=5
2007-06-22 05:28:56 · answer #1 · answered by wabawuby 2 · 0⤊ 0⤋
7(3x+4)=8(2x+5)+13
21x + 28 = 16x +40+13
5x = 25
x =5
2007-06-22 12:29:49 · answer #2 · answered by tfloto 6 · 0⤊ 0⤋
21x+28=16x+40+13
21x+28=16x+53
5x+28=53
5x=25
x=5
check: 7(3(5)+4)=8(2(5)+5)+13
133=133
2007-06-22 14:35:57 · answer #3 · answered by edina b 1 · 0⤊ 0⤋
21x + 28 = 16x + 53
5x = 25
x = 5
2007-06-24 05:32:30 · answer #4 · answered by Como 7 · 0⤊ 0⤋
21x+28=16x+40+13
=>21x+28=16x+53
=>5x+28=53
=>5x=25
=>x=5
so x=5
2007-06-26 11:45:22 · answer #5 · answered by ♫●GARV●♫ 6 · 0⤊ 0⤋
Remember PEMDAS
P arenthesis
E xponents
M ultiply
D ivision
A ddition
S ubtraction
21x+28=16x+40+13
21x+28=16x+53
21x=16x+53-28
21x=16x+25
21x-16x=25
5x=25
5x/5=25/5
x=5
Lashanda, summer school is a biatch but hang in there and you'll be happy you did!!!!
2007-06-22 12:30:52 · answer #6 · answered by Where's Wally 4 · 0⤊ 0⤋