Question

04(x-3)+2,5=0,5*(4+x) НАидите корень

x-4/4=x+3/7

Answer 1

0,4*(x-3) + 2,5 = 0,5*(4+x),
0,4х - 1,2 + 2,5 = 2 + 0,5х,
0,4х - 0,5х = 2 +1,2 - 2,5,
-0,1х = 0,7,
х = -7,

(х-4) / 4 = (х+3) / 7,
7*(х-4) = 4*(х+3),
7х - 28 = 4х + 12,
7х - 4х = 12 + 28,
3х = 40,
х = 40 / 3,
х = 13 1/3