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\(x=\frac{1}{2}+\frac{3}{4}=\frac{2}{4}+\frac{3}{4}=\frac{5}{4}\)
\(x-\frac{3}{4}=\frac{1}{2}\)
\(x=\frac{1}{2}+\frac{3}{4}\)
\(x=\frac{2}{4}+\frac{3}{4}\)
\(x=\frac{5}{4}\)
\(yx8+y+y=100\)
\(=y\)x \(\left(8+1+1\right)=100\)
\(=y\)x \(10=100\)
\(\Rightarrow y=100:10\)
\(\Rightarrow y=10\)
\(\frac{8}{11}+\frac{8}{33}\times\frac{3}{4}\)
\(=\frac{8}{11}+\frac{2}{11}\)
\(=\frac{8+2}{11}\)
\(=\frac{10}{11}\)
\(\frac{8}{11}+\frac{8}{33}\cdot\frac{3}{4}=\frac{8}{11}+\frac{8\cdot3}{33\cdot4}=\frac{8}{11}+\frac{2}{11}=\frac{10}{11}\)
\(\frac{7}{9}.\frac{3}{4}:\frac{5}{8}=\frac{7}{12}:\frac{5}{8}=\frac{7}{12}.\frac{8}{5}=\frac{14}{15}\)
a) \(5\times\left(3+7\times x\right)=400\)
\(3+7\times x=80\)
\(7\times x=77\)
\(x=11\)
b) \(x\times37+x\times63=1200\)
\(x\times\left(37+63\right)=1200\)
\(x\times100=1200\)
\(x=12\)
c) \(x\times6+12:3=40\)
\(x\times6+4=40\)
\(x\times6=36\)
\(x=6\)
d) \(4+6\times\left(x+1\right)=70\)
\(6\times\left(x+1\right)=66\)
\(x+1=11\)
\(x=10\)
e) \(163:x+34:x=10\)
\(\left(163+34\right):x=10\)
\(197:x=10\)
\(x=19,7\)
x:1/4=
x=8 x 1/4
x=2
8/4=2