2 x X - ( 67+ 34) :2 = 121
2 x X - 101 : 2 = 121
2 x X = 121 + 101 : 2
2 x X = 121 + 50,5
2 x X = 171,5
X = 171,5 : 2
X = 85,75
2x - 101 : 2 = 121
2x - 50,5 = 121
2x = 121 - 50,5
2x = 70,5
x = 70,5 : 2
x = 35,25
2xX-(67+34):2=121
2xX-101:2=121
2xX-50,5=121
2xX=..... lẻ...
X=.....
2 × X - ( 67 + 34 ) ÷ 2 = 121
2 × X - ( 67 + 34 ) ÷ 2 = 121
2 × X - 101 = 121 × 2
2 × X - 101 = 242
2 × X = 242 + 101
2 × X = 343
X = 343 ÷ 2
X = 171,5
2 .x - ( 67 + 34 ) : 2 = 121
2 . x - 101 : 2 = 121
2 . x - 50,5 = 121
2 . x = 121 + 50,5
2 . x = 171,5
x = 171,5 : 2
x = 85,75
Sorry
2x - 101 : 2 = 121
2x - 50,5 = 121
2x = 121 + 50,5
2x = 171,5
x = 171,5 : 2
x = 85,25
2 x X - (67 +34 ) : 2 =121
2 x X - 101 :2 =121
2 x X - 101 = 121 x 2
2 x X - 101 =242
2 x X = 242 + 101
2 x X =343
X = 343 : 2
X = 171.5
2 * x - ( 67 + 34 ) : 2 = 121
2 * x - 101 : 2 = 121
2 * x - 50,5 = 121
2 * x = 121 + 50,5
2 * x = 171,5
x = 171,5 : 2
x = 85, 75
Học tốt nhé! ^^
2*x-(67+34):2=121.
2*x-101:2=121.
2*x-50,5=121.
2*x=121+50,5.
2*x=171,5.
x=171,5:2.
x=85,75.
Vậy....
\(2\times x-\left(67+34\right)\div2=121\)
\(2\times x-101\div2=121\)
\(2\times x-50,5=121\)
\(2\times x=121+50,5\)
\(2\times x=171,5\)
\(x=171,5\div2\)
\(x=85,75\)