Question

6,2а+1,8b-(4,4a-5,4b) выражение, и решить уравнение0,24(х+300)-0,94х=163

Answer 1

1)6,2а+1,8b-(4,4a-5,4b); 6,2а+1,8b-4,4a+5,4b; 1,8a+7,2b; 2)0,24x+72-0.94x=163; -0,7x=163-72; -0,7x= 91; x=91:(-0,7); x=-130

Answer 2

6,2а + 1,8b - (4,4a - 5,4b) = 6,2а + 1,8b - 4,4a + 5,4b = 1.8a + 7.2b

0.24(x + 300) - 0.94x = 163
0.24x + 72 - 0.94x = 163
- 0.7x = 163 - 72
- 0.7x = 91
x = 91 : (- 0,7)
х = - 130
ответ: х = - 130.