rearrange equations, to give each equationin the form of X=
p = qs / 4x²
3y = 4 + X / 2
i would like to know how this is worked out
2006-09-20 03:51:36 · 4 answers · asked by mitch 1 in Science & Mathematics ➔ Mathematics
p = qs / 4x²
4p = qs / x²
x² = qs / 4p
x = +- square root ( qs / 4p )
3y = 4 + X / 2
6y = 8 + X
X = 6y - 8
2006-09-20 03:56:45 · answer #1 · answered by Axe 1 · 0⤊ 0⤋
p = qs / 4x²
4px² = qs
x² = qs / 4p
x = SQRT (qs/4p)
3y = 4 + X/2 cannot be solved because a simulateous equation requires you to have 2 equations and 2 unknowns (i.e x and y). You can solve for x when there's only one equation as there are infinitely many answers (i.e. all points along the straight line).
2006-09-20 14:09:42 · answer #2 · answered by Kemmy 6 · 0⤊ 0⤋
In the first, divide both sides by qs, to get p/qs = 4x^2, then take the square root of both sides, to get (p/qs)^.5 = 2x, then divide both sides by 2 and reverse the order, to get x = ((p/qs)^.5)/2.
In the second, subtract 4 from both sides, to get 3y - 4 = x/2, then reverse the order and multiply both sides by two, to get x = 6y - 8.
2006-09-20 11:00:27 · answer #3 · answered by David A 5 · 0⤊ 0⤋
Easiest way i know is to think of the equation as a set of instructions to find x. For the second one simply work away from the x. So to find x u would divide it by 2 and then add 4 and the answer is y. To get get your answer turn it around and do the opposite eg. start with y subtract 4 and then multiply by 2 and the answer is x !! Easy if u look at it in flow chart form.
2006-09-20 11:38:00 · answer #4 · answered by samthedog 3 · 0⤊ 0⤋