7(3x+4)=8(2x+5)+13solve for x?

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2007-08-27 10:16:20 · 3 answers · asked by Melissa F 1 in Science & Mathematics ➔ Mathematics

21x + 28 = 16x + 40 + 13
21x - 16x = 40 + 13 - 28
5x = 25
x = 5

2007-08-27 10:22:17 · answer #1 · answered by Anonymous · 0⤊ 0⤋

21 x + 28 = 16x + 40 + 13
5x = 53 - 28
5x = 25
x = 5

2007-08-27 10:33:49 · answer #2 · answered by Como 7 · 0⤊ 0⤋

21x+4=25
x=25
16x+5=21x
21x+13=34x
x=6.8

2007-08-29 10:34:01 · answer #3 · answered by Tiantay W 1 · 0⤊ 0⤋