Question

a)125+x\4-1\4=200
b)(25\8-x)-11\10=0
c)x-2\3-5\6=1\2

Cu tot cu calcule.
/ Este supra

Answer 1

a)  $125+ \frac{x}{4} - \frac{1}{4} =200$
~aducem la acelasi numitor(4)

$\frac{500}{4} + \frac{x}{4} - \frac{1}{4} =200$

$\frac{500-1+x}{4} =200$

$499+x=200*4$

$x=800-499$

x= 301

b) $(\frac{25}{8} -x)- \frac{11}{10} =0$

$\frac{25}{8} -x= \frac{11}{10}$

~aducem la acelasi numitor (8)

$\frac{25-8x}{8} = \frac{11}{10}$

$25-8x=8* \frac{11}{10}$

$-8x= \frac{88}{10} -25$

$-8x= \frac{88-250}{10}$

$-8x=- \frac{162}{10} | *(-1)$

$8x= \frac{162}{10}$    |:8

$x= \frac{81}{40}$

c) $\frac{x-2}{3} - \frac{5}{6} =\frac{1}{2}$

aducem la acelasi numitor (6) 

$\frac{2x-4}{6} - \frac{5}{6} = \frac{3}{6}$

$\frac{2x-4-5}{6} = \frac{3}{6}$    | * 6

2x-9=3
2x=3+9
2x=12
x=6