Question

解不等式:|2x-5|小于等于7

快啊！

Answer 1

得2x-5大于等于7或2x-5小于等于-7，
2x大于等于12或2x小于等于-2
即x大于等于6或x小于等于-1

Answer 2

解方程组：（一）2x-5<=7
（二）2x-5>=-7
结果：-1<=x<=6

Answer 3

得2x-5<=7和5-2x<=7

Answer 4

x<=6或x>=-1