10(x+2)=3(x-5)+7
2007-02-22 06:25:28 · 2 個解答 · 發問者 terrancekhho 7 in 科學 ➔ 數學
10(x+2)=3(x-5)+7
10x + 20 = 3x - 15 + 7
10x - 3x = -20 -15 + 7
7x = -28
x = -4
2007-02-22 06:30:34 · answer #1 · answered by Wilson 1 · 0⤊ 0⤋
10x+20=3x-15+7
10x+20=3x-8
10x-3x=20-8
7x=12
x=12/7
x=1.7142857..
2007-02-22 10:57:37 · answer #2 · answered by Lam 6 · 0⤊ 0⤋