a) \(219-7\times\left(x+1\right)=100\)
\(\Rightarrow7\times\left(x+1\right)=119\)
\(\Rightarrow x+1=17\)
\(\Rightarrow x=16\)
Vậy x = 16
b) \(\left(3\times x-6\right)\times3=246\)
\(\Rightarrow3\times x-6=82\)
\(\Rightarrow3\times x=88\)
\(\Rightarrow x=\frac{88}{3}\)
Vậy x = 88/3
a) 219 - 7 x [ X + 1 ] = 100
7 x [ X + 1 ] = 219 - 100
7 x [ X + 1 ] = 119
X + 1 = 119 : 7
X + 1 = 17
X = 17 - 1
X = 16
b) [ 3 x X - 6 ] x 3 = 246
3 x X - 6 = 246 : 3
3 x X - 6 = 82
3 x X = 82 + 6
3 x X = 90
X = 90 : 3
X = 30
Học tốt #
a) \(219-7\times\left(x+1\right)=100\)
\(\Rightarrow7\times\left(x+1\right)=219-100\)
\(\Rightarrow7\times\left(x+1\right)=119\)
\(\Rightarrow x+1=119:7\)
\(\Rightarrow x+1=17\)
\(\Rightarrow x=17-1\)
\(\Rightarrow x=16\)
Vậy x = 16
b) \(\left(3\times x-6\right)\times3=246\)
\(\Rightarrow3\times x-6=246:3\)
\(\Rightarrow3\times x-6=82\)
\(\Rightarrow3\times x=82+6\)
\(\Rightarrow3\times x=88\)
\(\Rightarrow x=88:3\)
\(\Rightarrow x=\frac{88}{3}\)
Vậy \(x=\frac{88}{3}\)
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