1. x:(52+48)=2 2. (350+x)*2=1000 3. (200+y)*3+500+1400 4. (y+50)*2+400-100

x : (52 + 48) = 2;

х : 100 = 2;

х = 2 * 100;

х = 200.

(350 + x) * 2 = 1000;

350 + х = 1000 : 2;

350 + х = 500;

х = 500 - 350;

х = 150.

(200 + y) * 3 + 500 = 1400;

(200 + у) * 3 = 1400 - 500;

(200 + у) * 3 = 900;

200 + у = 900 : 3;

200 + у = 300;

у = 300 - 200;

у = 100.

(y + 50) * 2 + 400 = 1000;

(у + 50) * 2 = 1000 - 400;

(у + 50) * 2 = 600;

у + 50 = 600 : 2;

у + 50 = 300;

у = 300 - 50;

у = 250.