Question

tìm X:
a) 31,5 - X = (18,6 - 12,3) : 3

b) X . 12,5 = (32,6 - 10,4) . 5

Answer 1

a) 31,5 - X = 2.1

X = 31,5 - 2,1

X = 29.4

b) X . 12,5 = 111

X = 111 : 12,5

X = 8.88

Answer 2

a)\(x=31,5-\left[\left(18,6-12,3\right):3\right]=31,5-2,1=29,4\)

b)\(x=\left[\left(32,6-10,4\right).5\right]=11112,5=8,88\)

Answer 3

\(a,31,5-x=2,1\)

\(x=31,5-2,1\)

\(x=30,8\)

\(b,x\cdot12,5=111\)

\(x=8,88\)

Answer 4

a 31.5 - x =6.3 : 3

31.5 - x =2.1

x = 31.5 - 2.1

x = 19.4

b 12.5x = 22.2 x 5 

12.5x = 111

x = 111 : 12.5

 x = 8.88

Answer 5