(1)16x-40=9x+16是多少?(2) 4x=20/3x+16 (3)2(3-x)=-4(x+5) (4)3(-2x-5)+2x=9

(1)16x-40=9x+16是多少?(2) 4x=20/3x+16 (3)2(3-x)=-4(x+5) (4)3(-2x-5)+2x=9
(1)16x-40=9x+16是多少?(2) 4x=20/3x+16 (3)2(3-x)=-4(x+5) (4)3(-2x-5)+2x=9

(1)16x-40=9x+16是多少?(2) 4x=20/3x+16 (3)2(3-x)=-4(x+5) (4)3(-2x-5)+2x=9
(1)16x-40=9x+16
7x=56
x=8
(2) 4x=20/3x+16
8/3x=-16
x=-6
(3)2(3-x)=-4(x+5)
6-2x=-4x-20
2x=-26
x=-13
(4)3(-2x-5)+2x=9
-6x-15+2x=9
4x=-24
x=-6

1.题 x=8
2题 x= -6
3题 x= -13
4题x=-6

x＝8
x＝－6
x＝－13
x＝1.5

x＝8