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(x+350):x+315=92.4-47
1+350:x+315=368-47
350:x+316=321
350:x=321-316
350:x=5
x=350:5
x=70
ok k ủng hộ nha
a) \(92.4-27=\frac{x+350}{x}+315\)
\(368-27=1+\frac{350}{x}+315\)
\(341=\frac{350}{x}+316\)
\(341-316=\frac{350}{x}\)
\(25=\frac{350}{x}\)
\(25x=350\)
\(x=14\)
b) \(\left(\frac{3}{2}-x\right).\frac{1}{3}-\frac{2}{3}.\left(\frac{1}{2}-x\right)=\frac{1}{3}\)
\(\frac{\frac{3}{2}}{3}-\frac{x}{3}-\frac{2}{3}.\left(\frac{1}{2}-x\right)=\frac{1}{3}\)
\(\frac{1}{2}-\frac{x}{2}-\frac{2}{3}.\left(\frac{1}{2}-x\right)=\frac{1}{3}\)
\(\frac{3}{2}-x-2.\left(\frac{1}{2}-x\right)=1\)
\(\frac{3}{2}-x-1+2x=1\)
\(\frac{1}{2}+x=1\)
\(x=1-\frac{1}{2}\)
\(x=\frac{1}{2}\)
a)(x-13)-17=0
=>X-13. = 0+17
=>x-13. =17
=>x. = 17+13
=>x. = 30
b)315+(125-x)=435
=>(125-x). =435-315
=>(125-x). =120
=>.x. = 5
c)575-(6x+70)=445
=>(6x+70). =575-445
=> (6x+70). =130
=>. 6x. =130-70
=>6x. =60
=>x. =60:6
=>X. =10
X=(1800+600):30):560:(315:35)
X=(2400:30):560:9
X=80:560:9
X=80x1/560x1/9
X=1/7x1/9
X=1/63
A=58x72+63x81-58x52-63x61
= (58x72-58x52)+(63x81-63x61)
= 58(72-52)+63(81-61)
= 58x20+63x20
= 1160+1260
= 2420
\(\frac{315}{316}\cdot\frac{316}{314}\cdot\frac{316}{315}\cdot\frac{317}{313}=\frac{315.316.316.317}{316.314.315.313}=\frac{1.1.316.317}{1.314.1.313}=\frac{100172}{98282}\)
Ta có : \(\frac{3}{2}\times\frac{4}{5}\times\frac{2}{3}\)
\(=\frac{3}{2}\times\frac{2}{3}\times\frac{4}{5}=1\times\frac{4}{5}\)
\(=\frac{4}{5}\)