`0.2x+0.3y= 1.3`, `0.4x+ 0.5y= 2.3`

0.3x + 0.7y = .13 0.4x + 0.5y = .13

Solve the following pair of linear equations by the substitution method. (i) x+y=14 ;x- y=4 (ii) s-t=3; s/3+t/2=6 (iii) 3x-y=3;9x-3y=9 (iv) 0. 2 x+0. 3 y=1. 3 ;0. 4 x+0. 5 y=2. 3 (v) sqrt(2)x+sqrt(3)y=0;sqrt(3)x-sqrt(8)y=0 (vi)3x/2-5y/2=-2;x/3+y/2=13/6

{:(0.4x + 0.3y = 1.7),(0.7x - 0.2y = 0.8):}

0.4 x + 0.3 y = 1.7 , 0.7 x - 0.2 y = 0.8

Solve for x and y : 0.4 x - 1.5 y = 6.5 , 0.3 x + 0.2 y = 0.9 .

2x + 3y = 0 , 3 x + 4y = 5 .

2x + 3y - 4=0 , 3x - y + 5 = 0

x- y + 3 = 0, 2x + 3y - 4 = 0 .

2x+3y=0 3x+4y=5