Question

найдите корень уравнения 4,5(7/15x+2/9)-0,77(8/11x-3/7)=-1,75

Answer 1

$4,5( \frac{7}{15} x+ \frac{2}{9} )-0,77( \frac{8}{11} x- \frac{3}{7} )=-1,75 \\ 2,1x+1-0,56x+0,33=-1,75 \\ 1,54x+1,33=-1,75 \\ 1,54x=-1,75-1,33 \\ 1,54x=-3,08 \\ x=-3,08:1,54 \\ x=-2$

Answer 2

4,5(7/15x+2/9)-0,77(8/11x-3/7)=-1,75
9/2 (7/15x+2/9) - 77/100(8/11x-3/7) = - 7/4
21/10x + 1 - 14/25x + 33/100 = -7/4
21/10x - 14/25x= -7/4 - 1 -33/100
105-28 /50x = -175- 100 -33 /100
77/50x = -154/50
x = -154/50 : 77/50
x = -2