To make x the subject of the formula x/a + x/b = 1, we need to eliminate the denominators a and b.
First, we can multiply both sides of the equation by the least common multiple (LCM) of a and b, which is ab.
ab(x/a) + ab(x/b) = ab(1)
bx + ax = ab
bx + ax - ab = 0
Next, we can factor out x from the left side of the equation:
x(b + a) - ab = 0
Finally, we can isolate x by adding ab to both sides and then dividing by (b + a):
x(b + a) = ab
x = ab/(b + a)
Therefore, x is the subject of the formula x = ab/(b + a).
Make x the subject of the formula in x/a +x/b=1
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