x:2,2=(28,7-13,5)×2
x-2=15,2×2
x-2=30,4
x=30,4+2=32,4
Vậy x=32,4
x × 12,5=(32,6-10,4):5
x × 12,5 =22,2:5
x × 12,5 =4,44
x=4,44:12,5=0,3552
Vậy x=0,3552
a)Ta có: x:2,2=(28,7-13,5)*2
=)x:2,2=30,4
=)x=66,88
b)Ta có:x x 12,5=(32,6-10,4):5
=)x x 12,5=4,44
=)x=0,3552
a) \(x:2,2=\left(28,7-13,5\right)\times2\) b) \(x\times12,5=\left(32,6-10,4\right):5\)
\(x:2,2=15,2\times2\) \(x\times12,5=22,2:5\)
\(x:2,2=30,4\) \(x\times12,5=4,44\)
\(x=30,4\times2,2\) \(x=4,44:12,5\)
\(x=66,88\) \(x=0,3552\)