Question

X x 1,5 = 8,6 x 15 + 4,5                                              3,24 x X- 0,38=21,12

Answer 1

`x xx 1,5 = 8,6 xx 15 + 4,5`

`x xx 1,5 = 129 + 4,5`

`x xx 1,5 =133,5`

`x = 133,5 : 1,5`

`x= 89`

_________________________

`3,24 xx x - 0,38 = 21,12`

`3,24 xx x = 21,12 + 0,38`

`3,24 xx x = 21,5`

`x = 21,5 : 3,24`

`x= 1075/162`

Answer 2

X x 1,5 = 8,6 x 15 + 4,5

X x 1,5 = 129 + 4,5

X x 1,5 = 133,5

X = 133,5 : 1,5

X = 89

3,24 x X - 0,38 = 21,12

3,24 x X = 21,12 + 0,38

3,24 x X = 21,5

X = 21,5 : 3,24

X = $\dfrac{1075}{162}$.

Answer 3

X x 1,5 = 133,5

        X = 133,5 : 1,5

        X = 89

Vậy X = 89

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Answer 4

\(x\times1,5=8,6\times15+45\)

\(x\times1,5=129+4,5\)

\(x\times1,5=133,5\)

\(x=133,5:5\)

\(x=8,9\)

\(3,24\times x-0,38=21,12\)

\(3,24\times x=21,12+0,38\)

\(3,24\times x=21,5\)

\(x=21,5:3,24\)

\(x=6,6358025\)