a) 7x-3=2 |+3 7x = 5 |:5 x = 1,4 b) 9x+5=4 |-5 9x=-9 |:9 x=-1 c) 2/3x+4=6 |-4 2/3x = 2 |*3/2 x= 3 d) 6-7/5x=1 -1/5x = 1 -0.2x = 1 |* -5 x=-5 e) x+4=14 |-4 x=10 f) x-100=1 |+100 x=101 g) x+7=0.05 |-7 x= -6.95 h) 10-x=4 |-10 -x = -6 |*-1 x=6 i) x-1/3=1/2 |+1/3 x=0.75 j) x+0,25=3/4 |-0,25 x=0,5 k) 2x-6|=10 |+6 2x=16 |:2 x=8 Proszę. : )
a) |7x-3| = 2 7x-3 = 2 lub 7x-3 = -2 7x = 5 lub 7x = 1 x = ⁵/₇ lub x = ¹/₇ b) |9x+5| = 4 9x+5 = 4 lub 9x+5 = -4 9x = -1 lub 9x = -9 x = -¹/₉ lub x = -1 c) |2/3x+4| = 6 ⅔x+4 = 6 lub ⅔x+4 = -6 ⅔x = 2 lub ⅔x = -10 x = 3 lub x = -15 d) |6-⁷/₅x| = 1 6-⁷/₅x = 1 lub 6-⁷/₅x = -1 ⁷/₅x = 5 lub ⁷/₅x = 7 x = ²⁵/₇ lub x = 5 e) |x+4| = 14 x+4 = 14 lub x+4 = -14 x = 10 lub x = -18 f) |x-100| = 1 x-100 = 1 lub x-100 = -1 x = 101 lub x = 99 g)| |x+7| = 0,05 x+7 = 0,05 lub x+7 = -0,05 x = -6,95 lub x = -7,05 h) |10-x| = 4 10-x = 4 lub 10-x = -4 x = 6 lub x = 14 i) |x-1/3|=1/2 x-⅓ = ½ lub x-⅓ = -½ x = ½ + ⅓ lub x = -½ + ⅓ x = ⁵/₆ lub x = -⅙ j) |x+0,25|=3/4 x+0,25 = ¾ lub x+0,25 = -¾ x = ½ lub x = -1 k) |2x-6|=10 2x-6 = 10 lub 2x-6 = -10 2x = 16 lub 2x = -4 x = 8 lub x = -2
