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541+(218-x)=375
541+218-x=375
759-x=375
x=384
5 .(x+35)=515
x+35=103
x=68
10+2.x=4^5:4
10+2.x=256
2x=246
x=123
96-3.(x+1)=42
3(x+1)=54
x+1=18
x=17
=.= hok tốt!!
\(541+\left(218-x\right)=375.\)
\(\Leftrightarrow218-x=-166\)
\(\Leftrightarrow x=218-\left(-166\right)\)
\(\Leftrightarrow x=384\)
\(5.\left(x+35\right)=515\)
\(\Leftrightarrow x+35=103\)
\(\Leftrightarrow x=103-35\)
\(\Leftrightarrow x=68\)
\(10+2x=4^5:4\)
\(\Leftrightarrow10+2x=4^4\)
\(\Leftrightarrow10+2x=256\)
\(\Leftrightarrow2x=256-10\)
\(\Leftrightarrow2x=246\)
\(\Leftrightarrow x=123\)
\(96-3.\left(x+1\right)=42\)
\(\Leftrightarrow3.\left(x+1\right)=96-42\)
\(\Leftrightarrow3\left(x+1\right)=54\)
\(\Leftrightarrow x+1=54:3\)
\(\Leftrightarrow x+1=18\)
\(\Leftrightarrow x=17\)
( 7200+7199) : 7198 = 7200 : 7198 + 7199 : 7198 = 49 + 7 = 56
( 73+72)x(53+ 56)x ( 33x 3-92) = ( 73+72).(53+ 56) . ( 3^4 - 3^4) = ( 73+72).(53+ 56) . 0 = 0
câu c thì bn xem lại đề nha 23x7x53-( 52x 65+ 52x 35) hay 23x7x53-( 52x 65+ 52 x 35)
a) \(5.\left(x-3\right)=15\)
\(x-3=15:5\)
\(x-3=3\)
\(x=6\)
b)\(10+2.x=4^5:4^3\)
\(10+2.x=16\)
\(2x=16-10\)
\(2x=6\)
\(x=3\)
c) \(5^{x+1}=125\)
\(5^{x+1}=5^3\)
\(x+1=3\)
\(x=2\)
d) \(5^{2x-3}-2.5^2=5^2.3\)
\(5^{2x-3}=2.5^2+5^2.3\)
\(5^{2x-3}=125\)
\(5^{2x-3}=5^2\)
\(2x-3=2\)
\(2x=6\)
\(x=3\)
Mk nhanh nek bn
\(10^5=10.10.10.10.10=100000\)
\(10^2=100\)
\(10^5+10^2=100000+100=100100\)
nhae
\(\left\{5.\left[42:\left(5.3+50:10\right).3:2+4\right]\right\}+\left\{35.\left[63:9.\left(5^2\right)\right]\right\}\\ =\left\{5.\left[42:\left(15+5\right).1,5+4\right]\right\}+\left\{35.\left(9.25\right)\right\}\\ =\left\{5.\left[42:20.1,5+4\right]\right\}+\left\{35.225\right\}\\ =\left\{5.\left[2,1.1,5+4\right]\right\}+7875\\ =\left\{5.\left[3,15+4\right]\right\}+7875\\ =\left\{5.7,15\right\}+7875\\ =35,75+7875\\ =7910,75\)
{5.[42:(5.3+50:10).3:2+4]}+{35.[63:9.(52)]}={5.[42:(15+5).1,5+4]}+{35.(9.25)}={5.[42:20.1,5+4]}+{35.225}={5.[2,1.1,5+4]}+7875={5.[3,15+4]}+7875={5.7,15}+7875=35,75+7875=7910,75