Question

решите пж срочно пожалуйста !!!!!​

Answer 1

$1)\ 2,16a-0,7a+1,04a=11,77\\2,5a = 11,77\\a = \frac{11,77}{2,5}\\a = 4,708\\\\2) \ 15,05b+3,2b-b=34,5\\17,25b = 34,5\\b = \frac{34,5}{17,25} \\b = 2\\\\3) \ 4,8d+5,91+13,2d = 150\\18d = 144,09\\d = \frac{144,09}{18} \\d = 8,005\\\\4) \ 0,2c+1,6c+1,1=52,5+3,5\\1,8c+1,1 = 56\\1,8c = 56-1,1\\1,8c=54,9\\c = 54,9/1,8\\c = 30,5$