\(7^2.5-\left(2x+1\right)=630:9\)
\(49.5-\left(2x+1\right)=70\)
\(245-\left(2x+1\right)=70\)
\(2x+1=245-70=175\)
\(2x=175-1=174\)
\(x=174:2=87\)
Vậy x=87
Mọi người tk cho mình nhé. Mình cảm ơn nhiều ^-^
7^2*5-(2x+1)=630/9
49*5-(2x+1)=90
245-(2x+1)=90
2x+1=245-90
2x+1=155
2x=155-1
2x=154
x=154/2
x=77
Vậy x=77
k cho mình nha
\(7^2.5-\left(2x+1\right)=630:9\)
\(\Rightarrow245-\left(2x+1\right)=70\)
\(\Rightarrow2x+1=245-70\)
\(2x+1=175\)
\(\Rightarrow x=\left(175-1\right)\div2=87\)
Vậy x=87
\(7^2.5-\left(2x+1\right)=630:9\)
\(245-\left(2x+1\right)=70\)
\(2x+1=245-70\)
\(2x+1=175\)
\(2x=175-1\)
\(2x=174\)
\(x=87\)
49.5-(2x+1)=630:9
245-(2x+1)=70
(2x+1)=245-70
(2x+1)=175
2x=175-1
2x=174
x=174:2
x=87
7^2.5-(2x+1)=630:9 <=>49.5(2x+1)=70 <=>245(2x+1)=70 <=>2x+1=175 <=>2x=174 <=>x=87
