How do you solve 1/2x-5/3=-1/2x+19/4?

2 Answers
Jan 25, 2017

See the entire solution process below:

Explanation:

First, multiply both sides of the equation by color(red)(12) (the lowest common denominator of all the fractions) to eliminate the fractions while keeping the equation balanced:

color(red)(12)(1/2x - 5/3) = color(red)(12)(-1/2 x + 19/4)

(color(red)(12) xx 1/2x) - (color(red)(12) xx 5/3) = (color(red)(12) xx -1/2x) + (color(red)(12) xx 19/4)

(6 xx 1x) - (4 xx 5) = (6 xx -1x) + (3 xx 19)

6x - 20 = -6x + 57

Next, add color(red)(6x) and color(blue)(20) to each side of the equation to isolate the x term on the left side of the equation:

6x - 20 + color(red)(6x) + color(blue)(20) = -6x + 57 + color(red)(6x) + color(blue)(20)

6x + color(red)(6x) - 20 + color(blue)(20) = -6x + color(red)(6x) + 57 + color(blue)(20)

12x - 0 = 0 + 77

12x = 77

Now, divide each side by color(red)(12) to solve for x while keeping the equation balanced:

(12x)/color(red)(12) = 77/color(red)(12)

(color(red)(cancel(color(black)(12)))x)/cancel(color(red)(12)) = 77/12

x = 77/12

Jan 25, 2017

x = "77"/"12"

Explanation:

"1"/2"x" - "5"/"3" = -"1"/2"x" + "19"/"4"

"1"/2"x" + "1"/2"x" = "19"/"4" + "5"/"3"

"1x + 1x"/"2" = "(19)(3) + (5)(4)"/"12"

"2x"/"2" = "57 + 20"/"12"

x = "77"/12"