Question

Giải chi tiết

Answer 1

a/

\(\rightarrow3\left(x+1\right)=96-42\\ 3\left(x+1\right)=54\\ x+1=54:3\\ x+1=18\\ x=18-1\\ x=17\)

b/

\(7\left(x-15\right)=219-100\\ 7\left(x-15\right)=119\\ x-15=119:7\\ x-15=17\\ x=17+15\\ x=32\)

c/

\(7x=713+8\\ 7x=721\\ x=721:7\\ x=103\)

d/

\(\left[\left(6x-72\right):2-84\right]=5628:28\\ \left[\left(6x-72\right):2-84\right]=201\\ \left(6x-72\right):2=201+84\\ \left(6x-72\right):2=285\\ 6x-72=285.2\\ 6x-72=570\\ 6x=570+72\\ 6x=642\\ x=642:6\\ x=107\)