219-7(x-1)=100
7(x-1)= 219-100
7(x-1)=119
x-1=119:7
x-1=17
x=17+1
x=18
Ủng hộ tui nha !!!
219 - 7(x-1) = 100
7 (x -1) = 219 - 100 = 119
x - 1 = 119 : 7 = 17
x = 17 + 1 = 18
mình nhanh nhất
219 - 7(x - 1) = 100
7(x-1) = 219 - 100
7(x-1) = 119
x-1 = 119 : 7
x-1 = 17
x = 17 + 1
x = 18
\(7\left(x-1\right)=219-100\)
\(7\left(x-1\right)=119\)
\(x-1=119:7\)
\(x-1=17\)
\(x=17+1\)
\(x=18\)
\(219-7\left(x-1\right)=100\)
\(7\left(x-1\right)=219-100\)
\(7\left(x-1\right)=119\)
\(\left(x-1\right)=119\div7\)
\(x-1=17\)
\(x=17+1\)
\(x=18\)
Vậy \(x=18\)
219-7(x-1)=100
7(x-1)=219-100
7(x-1)=119
x-1=119:7
x-1=17
x=17+1
x=18
ủng hộ mk nhé, đúng 100% đó
219-7(x-1)=100
7(x-1)=219-100
7(x-1)=119
x-1=119:7
x-1=17
x=17+1
x=18
nha bạn 
^_^
219-7(x-1)=100
7(x-1)=219-100
7(x-1)=119
x-1=119:7
x-1=17
x=17+1
x=18
Vay x=18
\(219-7\left(x-1\right)=100\)
\(\Rightarrow7\left(x-1\right)=119\)
\(\Rightarrow x-1=17\)
\(\Rightarrow x=18\)
219 - 7(x - 1) = 100
7(x - 1) = 219 - 100
7(x - 1) = 119
x - 1 = 119 : 7
x - 1 = 17
x = 17 + 1
x = 18
219 - 7(x - 1) = 100
7(x-1) = 219 - 100
7(x-1) = 119
x-1 = 119 : 7
x-1 = 17
x = 17 + 1
x = 18
hello mấy bn mình là thành viên mới có gì thì chỉ bảo nhau nhé thanks ^.^
