A few days ago
7/9x+7=8x+4/9?solve for x?
keep it very detailed plz
Top 5 Answers
A few days ago
Favorite Answer
7/9x + 7 = 8x + 4/9……………Multiply thro by 9x:
7 + 63x = 72x^2 + 4x………..Take 4x from each side:
7 + 59x = 72x^2……………….Take 7 from each side:
59x = 72x^2 – 7………………..Take 59x from each side:
72x^2 – 59x -7 = 0.
This will not factorise, so you must use the quadratic formula to solve from now on.
Hope this helps, Twiggy
1
A few days ago
multiply both sides by 9 to get rid of the fractions:
9( 7/9x + 7) = (8x + 4/9) 9
7x + 63 = 72x + 4
then get like variables on each side of the equal sign:
63 – 4 = 72x -7x
59 = 65x
Then divide by the number with x to get x’s value:
59/65 = x
0
4 years ago
The y-intercept is what y is collectively as x is 0: 0^2 – 8(0) + 7 = 7. that could desire to be (0,7). you do no longer might desire to prepare derivatives to locate the vertex in Algebra. you are able to at as quickly as stumble on the x-coordinate of the vertex of a parabola by means of making use of making use of the -B/2A ingredient to the quadratic equation. as a result A = one million, B = -8, C = 7 so -B/2A = -(-8)/2(one million) = 4. collectively as x = 4, y = 4^2 – 8(4) + 7 = sixteen – 32 + 7 = -9. So the vertex is (4, -9).
0
A few days ago
7/9x +7=8x +4/9
8x-7/9x=7-4/9
0/1x=2/1
x=21
0
A few days ago
7/9x-8x=4/9-7
-65/9x = -59/9
-65x = -531/9
-65x = 59
x = /59/65
0
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