a) 4x+5=65 {12,5} 4x + 5 = 65 4x = 65-5 4x = 60 /: 4 x= 15 Odp. liczba: 15 b) 4m+9=45 {4,2,9} 4m + 9 = 45 4m = 45 - 9 4m = 36 /: 4 m = 9 Odp. liczba 9 c) 58-5k=13 {3,4,9} 58-5k=13 -5k = 13 - 58 -5k = -45 /: (-5) k = 9 Odp. liczba 9 d) 8-64=0 {0,4,8} 8-64=0 8 = 64 /:8 0=8 Odp. liczba 8 e) 6r+4=7 {½, ⅓, ¼} 6r+4=7 6r = 7-4 6r = 3 /:6 r = ½ Odp. liczba ½ f) -15t-46=-1 {-3, -2, -1} -15t - 46= -1 -15t = -1+46 -15t = 45 /: (-15) t = -3 Odp. liczba -3
a) 4m + 5 = 65 4m = 65 - 5 4m = 60 m = 60/4 m = 12 b) 4m + 9 = 45 4m = 45 - 9 4m = 36 m = 36 / 4 m = 9 c) 58-5k = 13 - 5k = 13- 58 - 5k = -45 k = 9 d) e) 6r +4=7 6r = 7-4 6r = 3 r = ½ f) -15t -46 = -1 -15t = -1+46 -15t = 45 t = -3
a) 4x+5=65)-5 4x=60/4 x=15 {12,5}-cos tu nie pasuje b) 4m+9=45/-9 {4,2,9} 4m=36/4 m=9 c) 58-5k=13/-58 {3,4,9} -5k=-45/(-5) k=9 d) 8a-64=0/+64 {0,4,8} 8a=64/8 a=8 e) 6r+4=7/-4 {½, ⅓, ¼} 6r=3/6 r=3/6=1/2 f) -15t-46=-1/+46 {-3, -2, -1} -15t=45/(-15) t=-3
Która z podanych liczb w nawiasie jest rozwiązaniem równania. 4x+5=65 (12,15) 4m+9=45 (4,2,9) 58-5k=13 (3,4,9) 8a-64=0 (0,4,8) 6r+4=7 (1/2,1/3,1/4-to ułamki) -15t-46=-1 (-3,-2,-1)...
