4,3*13x=11,18
13x=11,18:4,3
13x=2,6
x=2,6:13
x=0,2
<span> 4,3 * ( 15x - 2x) = 11,18</span>
<span>64,5х-8,6х=11,18</span>
<span>55,9х=11,18</span>
<span>х=0,2</span>