bài 4 tìm số nguyên x biết
a, 23-3x=17 a,5-(10-x)=7 a, |x + 3| = 15
b, 89-(-73-x)=20 b, -32-(x-5)=0 b, |x - 3|-16=-4
c, (x-7)-25=13 c,-2x-35=15 c, x+(x+1) +(x+3)+.....+(x+30)=1240
d,98 -(x+4)=20 d,11+3.(15-)+-16
e, 50-(x-3)=4 e, -16+23+x+-16
f 2x+17=12