Page 142 - Grade 10 C.Math

oxfF, 10x + y = 5(x + y)

cyjf, 10x + y = 5x + 5y

cyjf, 10x - 5x = 5y - y

cyjf, 5x = 4y
Curriculum Development Centre
cyjf x = y ....... (i)

k]ml/ xy = 20 ........ (ii)

cyjf, y x y = 20 [;dLs/0f (i) af6)

cyjf, 4y = 100
2
cyjf, y = 25
2
cyjf, y - 25 = 0
2
cyjf, (y - 5) (y + 5) = 0

cyjf, y = 5 jf y = -5

oxfF wgfTds dfg dfq lng ;lsG5 . To;}n], y = 5

k]ml/, ;dLs/0f (i) af6, x = x 5 = 4

ctM rflxPsf] ;ª\Vof = 10x + y
= 10 x 4 + 5

= 40 + 5 = 45

pbfx/0f 4

olb xfn b'O{ hgf bfh'efOsf] pd]/ j|mdzM 10 jif{ / 12 jif{ 5 . slt jif{kl5 ltgLx¿sf]
pd]/sf] u'0fg kmn 360 x'G5 < kTtf nufpg'xf];\ .

;dfwfg
dfgf}F, x jif{kl5 ltgLx¿sf] pd]/sf] u'0fg kmn 360 x'G5 .

To;}n] (10 + x) (12 + x) = 360

cyjf, 120 + 12x + 10x + x = 360
2
cyjf, x + 22x + 120 - 360 = 0
2
cyjf, x + 22x - 240 = 0
2

139 ul0ft, sIff – 10