Question

Tìm x, biết: x × 18 = 28 × 3,6 +36 ×7,2

Answer 1

\(x\)  x 18 = 28 x 3,6 + 36 x 7,2

\(x\) x 18 = 28 x 3,6 + 3,6 x 72 

\(x\) x 18 = 3,6 x ( 28 + 72)

\(x\) x 18 = 3,6 x 100

\(x\)   x 18     = 360

\(x\)           =    360 : 18

\(x\)           = 20

 

 

Answer 2

=>x*18=36*2,8+36*7,2=360

=>x=20

Answer 3

\(x\times18=28\times3,6+36\times7,2\)

\(x\times18=28\times3,6+3,6\times72\)

\(x\times18=3,6\times\left(28+72\right)\)

\(x\times18=3,6\times100\)

\(x\times18=360\)

\(x=360:18\)

\(x=20\)