Question

a+b=200
a=b+50
a,+b=?

x+y=460
y=X+180
X,y=?

m+n=380
m-n=100
m,n=?
Va dau coroana!​

Answer 1

rescriem:

$a+b=200 \\ a - b = 50$

adunăm:

$2a = 250 \implies a = 125$

$b = 200-125 \implies b = 75$

.

rescriem:

$y + x = 460 \\ y - x = 180$

adunăm:

$2y = 640 \implies y = 320$

$x = 460 - 320 \implies x = 140$

.

$m+n=380 \\ m-n=100$

adunăm:

$2m = 480 \implies m = 240$

$n = 380 - 240 \implies n = 140$

Answer 2

a+b=200

b+b+50 =200

2*b = 150

b=75

a=75+50

a=125

x+y=460

x+x+180 =460

2*x=280

x=140

y=140+180

y=320

m+n=380

m-n=100 deci m=100+n

100+n+n=380

2*n=280

n=140

m=100+140

m=240