Question

0,3 • (5х - 7)= 3 (0,2х+3,2)

Answer 1

сократить на 0.3 и получится:
5x-7=10(0.2x+3.2);
5х-7=2х+32;
3х=39;
х=13.

Answer 2

5x-7=10(0.2x+3.2); 
5х-7=2х+32; 
3х=39; 
х=13.