Помогите решить примеры:

(d-295) * 13=260,

25 * (540-s) = 2500,

t: (6000-5996) = 600,

(471+h) : 11=781.

1) (d-295) х13=260

13d-295x13=260

13d-3835=260

13d=260+3835

13d=4095

d=4095:13

d=315

2) 25x (540-s) = 2500

25x540-25s=2500

13500-25s=2500

25s=13500-2500

25s=11000

s=11000:25

s=440

3) t: (6000-5996) = 600

t:4=600

t=600x4

t=2400

4) (471+h) : 11=781

471+h=781x11

471+h=8951

h=8951-471

h=8120