Question

Am si eu doua exercitii

Answer 1

36) b=2a
b=c+170
d=c-90
d=a

b=c+170=>c=b-170=>c=2c-180-170=>350=2c-c=>c=350
b=2d=>b=2(c-90)=>b=2c-180
d=350-90=260
a=d=260
b=350+170=520

a=260 ; b=520 ; c=350 ; d=260

37) b=2a
b=c-150=>c=b+150
d=a+b
e=2b
e=c+210=>e=b+150+210=>2b=b+360=>2b-b=360=>b=360

e=2x360=>e=720
b=2a=>360=2a=>a=360:2=>a=180
c=b+150=>c=360+150=510
d=a+b=180+360=540

a=180 ; b=360 ; c=510 ; d=540 ; e=720