3(x + 20) + ( x + 20) + x = 180
2007-03-10 10:36:32 · 7 answers · asked by Maime 1 in Science & Mathematics ➔ Mathematics
5x+80=180
5x = 100
x = 100/5
x=20
2007-03-10 10:41:08 · answer #1 · answered by piri82 3 · 1⤊ 0⤋
3x + 60 + x + 20 +x = 180
=> 5x = 100
=> x = 20
2007-03-10 19:05:40 · answer #2 · answered by Dulcy L 1 · 0⤊ 0⤋
3(x + 20) + ( x + 20) + x = 180
3x + 60 + x + 20 + x = 180
5x + 80 = 180
5x = 100
x = 20
2007-03-10 18:42:52 · answer #3 · answered by Bhajun Singh 4 · 0⤊ 0⤋
3(x + 20) + ( x + 20) + x = 180
distribute
3x+60+x+20+x=180
combine like terms
5x+80=180
subtract 80 from both sides
5x=100
divide 5 from both sides
x=20
2007-03-10 18:50:18 · answer #4 · answered by Winnie 3 · 0⤊ 0⤋
3(x + 20) + ( x + 20) + x = 180
3X+60+X+20+X=180
5x+80=180
5X=100
X=20
2007-03-11 00:01:42 · answer #5 · answered by John S 2 · 0⤊ 0⤋
first you distribute the 3 to the x and 20 inside the first parenthesis:
3x+60+x+20+x=180
then you add the x's together and separately add the 20 and 60:
5x+80=180
then you subtract 80 from both sides:
5x=100
then you divide both sides by 5:
x=20
2007-03-10 18:46:40 · answer #6 · answered by Anonymous · 0⤊ 0⤋
simplify
3x+60+x+20+x=180
5x+80=180
5x= 100
x=20
2007-03-10 18:42:01 · answer #7 · answered by lcjjr87 2 · 0⤊ 0⤋