How do you solve for x? 7x+19=-2x+55
2006-09-18 12:12:53 · 6 answers · asked by Just Me 4 in Education & Reference ➔ Homework Help
7x+19 = -2x+55
7x+19+2x = -2x+55 +2x (add 2x to each side)
9x+19 = 55
9x+19 - 19 = 55 -19 (subtract 19 from each side)
9x = 36
9x/9 = 36/9 (divide each side by 9)
x=4
2006-09-18 12:16:35 · answer #1 · answered by LadyJag 5 · 1⤊ 0⤋
general rule of thumb is put all the unknowns on one side, and knowns on the other side.
Here we have, 7x + 19 = -2x +55
= 7x+2X = 55-19
9x = 36
x = 36/9 = 4
x = 4
2006-09-18 14:03:13 · answer #2 · answered by weirdoonee 4 · 0⤊ 0⤋
you add 2 to the 7x (becuz you change it to a positive)then you will have 9x+19=55...then you subtract 19 from 55 making it 36
so 9x=36 you then divide 36 by 9...
x=4
-hope this helps
2006-09-18 12:19:31 · answer #3 · answered by bella! 2 · 0⤊ 0⤋
7x+2x=55-19
9x = 36
x = 36/9
x = 4
2006-09-19 23:45:35 · answer #4 · answered by swetlana 1 · 0⤊ 0⤋
subtract 19 from +19 and +55 add -2 and +36 and you get +34, divide 7 by 34, leave as fraction. there is x. remember always do the opposite. what you do to one side do to the other. hope this helps.
2006-09-18 12:22:56 · answer #5 · answered by Jordan 1 · 0⤊ 0⤋
7x+19=2x+55
7x-2x=55-19
5x=36
x=36/5
2006-09-18 13:20:24 · answer #6 · answered by sonu 1 · 0⤊ 0⤋