Question

tìm x

a) x x 1,4 = 2,8 x 1,5.            b) 1,02 x x = 3,57 x 3,06

Answer 1

a)

\(x.1,4=2,8.1,5\)

\(x.1,4=4,2\)

\(x=4,2:1,4\)

\(x=3\)

b)

\(1,02.x=3,57.3,06\)

\(1,02.x=10,9242\)

\(x=10,9242:1,02\)

\(x=10,71\)

Answer 2

\(a,x\times1,4=2,8\times1,5\\ x\times1,4=4,2\\ x=4,2:1,4\\ x=3\)

\(b,1,02\times x=3,57\times3,06\\ 1,02\times x=10,9242\\ x=10,9242:1,02\\ x=10,71\)