Question

1)8(х-1,4)=0,56 2)(4,6-х)*19=4,18 3)(51,32+х)*0,12=72 4)17,28:(56-х)=36

Answer 1

1)8(х-1,4)=0,56

$x-1.4= \frac{0.56}{8}$

$x-1.4=0.56*0.125$

$x-1.4=0.07$

$x=0.07+1.4$

$x=1.47$

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2)(4,6-х)*19=4,18

$\frac{19(4.6-x)}{19}=\frac{4.18}{19}$

$4.6-x=\frac{4.18}{19}$

$4.6-x=0.22$

$-x=0.22-4.6$

$-x=-4.38$

 

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3)(51,32+х)*0,12=72

$\frac{0.12(x+51.32)}{0.12}=\frac{72}{0.12}$

$x+51.32=\frac{72}{0.12}$

$x+51.32=600$

$x=600-51.32$

$x=548.68$

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  4)17,28:(56-х)=36

56-x=17.28/36

56-x=0.48

-x=-55.52

x=55.52