32 + ( x + 3) = 17
=> x + 3 = 15
=> x = 12 (tm)
32 + 2(x -2) = 64
=> 2(x-2) = 32
=> x - 2 = 16
=> x = 18 (tm)
a) 32+(x+3)=17
=>x+3=17-32=-15
=>x=-15-3=-18
b) 32+2(x-2)=64
=>2(x-2)=64-32=32
=>x-2=32:2=16
=>x=16+2=18
=>x=18
Bài này mk làm sai câu a rùi nha bạn!! Xin lỗi
32+(x+3)=17
x+3=32-17
x+3=15
x=15-3
x=12
32+2(x-2)=64
2(x-2)=64-32
2(x-2)=32
x-2=32:2
x-2=16
x=16+2
x=18