rozwiaz uklady rownan : a) 3(x-½)+2(y+3)=3½ 3x-1/3 - y+3/2 = -1 b) x-3/4 - y+5/2 = - 1,5 x-3/2 - 2y-7/3 = 1 c) 2x-5/2 - x-6y/4 = x+y/2 3x-1/10 + 2y-5/5 = 2x+y/2 Daje naj :P

a) 3(x-½)+2(y+3)=3½ 3x-⅓-y+³/₂=-1 3x-1,5+2y+6=3,5 3x-y=-1-³/₂+⅓ 3x+2y=3,5+1,5-6 3x-y=-1-⁹/₆-²/₉ 3x+2y=-1 3x-y=-1-1¹/₆ |×-1 3x+2y=-1 -3+y=-2¹/₆ ----------------- 3y=-3¹/₆ |÷3 y=1¹/₁₈ 3x=-1-2×(1¹/₁₈) 3x=³⁸/₁₈ |÷3 x=³⁸/₆ x=6⅓ x=6⅓ y=1¹/₁₈ b) x-3/4 - y+5/2 = - 1,5 x-3/2 - 2y-7/3 = 1 x-y=-1,5+0,75-2,5 x-2y=1+1,5+2⅓ x-y=-3¼ x-2y=3¹/₆ x=-3¼+y -3¼+y-2y=3¹/₆ -y=3¹/₆+3¼ y=-6⁵/₁₂ x=-3¼+y y=-6⁵/₁₂ c) 2x-5/2 - x-6y/4 = x+y/2 |×4 3x-1/10 + 2y-5/5 = 2x+y/2 |×10 4x-10-x+6y=2x+2y 3x-1+4y-10=10x+5y 4x-2x-x-2y=10 3x-10x+4y-5y=1+10 x-2y=10 -7x-y=11 x=10+2y -7(10+2y)-y=11 -70-14y=11 -14y=81 |÷-14 y=-5¹¹/₁₄ x=10+2(-5¹¹/₁₄) x=10-11⁴/₇ x=-1⁴/₇ x=-1⁴/₇ y=-5¹¹/₁₄