a) 4x+7 =19 4x=19-7 4x=12 x=3 spr; 4*3+7= 12+7 =19 b) 10x-23=27 10x=27+23 10x= 50 x=5 spr; 10*5-23= 50-23 =27 c) -3x+4=31 -3x=31-4 -3x=27 3x=-27 x=-9 spr; -3*(-9)+4=27+4=31 d)-6x+3= -33 -6x=-36 6x=36 x=6 spr; -6*6+3= -36+3=-33 e) 4-y=1 -y=1-4 -y=-3 y=3 spr; 4-3=1 f) 12-x=2 -x=2-12 -x=-10 x=10 spr; 12-10=2 g) -3-y=3 -y=3+3 -y=6 y=-6 spr -3-(-6)= -3+6= 3 h) -7-x=-3 -x= -3+7 -x=4 x=-4 spr; -7-(-4)= -7+4 = -3
a) 4x+7=19 4x = 19 - 7 4x = 12 / : 4 x = 3 spr : 4 * 3 + 7 = 19 19 = 19 b) 10x-23=27 10 x = 27 + 23 10 x = 50 / : 10 x = 5 spr; 10 * 5 - 23 = 27 50 - 23 = 27 27 = 27 c) -3x+4=31 -3x = 31 - 4 - 3 x = 27 / : ( - 3 ) x = ( - 9 ) spr: - 3 * (-9) + 4 = 31 31 = 31 d) -6x+3= -33 - 6 x = - 33 - 3 - 6 x = - 36 / : ( 6 ) x = 6 spr: - 6 * 6 + 3 = - 33 - 36 + 3 = - 33 - 33 = - 33 e) 4- y=1 - y = 1 - 4 / : ( - 1 ) y = -1 + 4 y = 3 spr: 4 - 3 = 1 1 = 1 f) 12-x=2 - x = 2 - 12 / : ( - 1 ) x = - 2 + 12 x = 10 spr: 12 - 10 = 2 2 = 2 g) -3 -y = 3 - y = 3+ 3 - y = 6 / : ( -1) y = -6 spr: - 3 - (- 6 ) = 3 - 3 + 6 = 3 3 = 3 h) -7 -x= -3 - x = - 3 + 7 - x = 4 / : ( - 1 ) x = - 4 spr: - 7 - ( - 4 ) = - 3 -3 = - 3 Myślę, że pomogłam. W razie pytań pisz ;)))
