I found the answer on my calculator, it's 40 but when i do it by hand i always get 70 or some different answer.
更新1:
thank you. i just realised that i didn't multiply everything in the left side by 2. im dead tired after my first week of school.
Can someone help me solve this equation?
2009-02-05 10:00 am
x/2 + 2x-10 + x = 130
I found the answer on my calculator, it's 40 but when i do it by hand i always get 70 or some different answer.
I found the answer on my calculator, it's 40 but when i do it by hand i always get 70 or some different answer.
回答 (9)
2009-02-05 10:05 am
✔ 最佳答案
x/2 + 2x - 10 + x = 130x/2 + 2x + x = 130 + 10
x/2 + 4x/2 + 2x/2 = 140(2/2)
7x/2 = 280x/2
7x = 280
x = 40
anvil ltd.
2009-02-05 7:03 pm
x/2 + 2x - 10 + x = 130
x/2 + 2x + x = 130 + 10
x(1/2 + 2 + 1) = 140
x(1/2 + 3) = 140
x(1/2 + 6/2) = 140
x(7/2) = 140
x = 140/(7/2)
x = 140(2/7)
x = 40
x/2 + 2x + x = 130 + 10
x(1/2 + 2 + 1) = 140
x(1/2 + 3) = 140
x(1/2 + 6/2) = 140
x(7/2) = 140
x = 140/(7/2)
x = 140(2/7)
x = 40
2009-02-05 6:53 pm
x/2 + 3x - 10 = 130
x + 6x - 20 = 260
7x = 280
x = 40
x + 6x - 20 = 260
7x = 280
x = 40
2009-02-05 6:30 pm
x/2+2x-10+x=130
x/2+2x+x=140
x/2+3x=140
x+6x/2=140
7x=280
x=40
x/2+2x+x=140
x/2+3x=140
x+6x/2=140
7x=280
x=40
2009-02-05 6:28 pm
the answer it is 40. x/2 is equal to 1/2x so;
1/2x + 2x-10+x=130 pass the -10 to 130
1/2x+2x+x=140 you add 2x + x
1/2x+3x=140 you add 1/2 of x plus 3x
3 1/2x=140 you divide 140 over 31/2
x=40
other questions let me know
1/2x + 2x-10+x=130 pass the -10 to 130
1/2x+2x+x=140 you add 2x + x
1/2x+3x=140 you add 1/2 of x plus 3x
3 1/2x=140 you divide 140 over 31/2
x=40
other questions let me know
2009-02-05 6:07 pm
I'll solve so you could see
x/2 + 2x - 10 + x = 130
Multiply by 2 to remove fraction
x + 4x - 20 + 2x = 260
x + 4x + 2x = 260 + 20
7x = 280
x = 280/7 = 40
x/2 + 2x - 10 + x = 130
Multiply by 2 to remove fraction
x + 4x - 20 + 2x = 260
x + 4x + 2x = 260 + 20
7x = 280
x = 280/7 = 40
2009-02-05 6:07 pm
x/2 + 2x-10 + x = 130
x + 4x - 20 + 2x = 260
7x = 260 + 20
x = 280/7
x=40
Enjoy
x + 4x - 20 + 2x = 260
7x = 260 + 20
x = 280/7
x=40
Enjoy
2009-02-05 6:06 pm
its 40
2009-02-05 6:04 pm
x both sides by 2 (to get rid of the denominator in the x/2 fraction)...... then add the x to the 2x and the other x... then add 10 to both sides..... then add the 10 to the 130 on the right side.... then divide by 3.
參考: omg i keep getting 70 too.. wtf?!?!? this problem is rigged
收錄日期: 2021-05-01 11:56:57
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