Question

e Află valoarea lui a din egalităţile: a) à x 14 + 244 = 1 000 b) [(a : 9) x 7+ (102 : 2)] - 49 = 58 c) 8 x a + 573 : 3 - 93 = 210 d) a x 10 : 3 = 4500 e) 1 + 1 + 1 + 1 + 1 + 1 x 1 x 1 x 1 x 1 = 1 xa f) 14+ 14 x 2 = 7 x 2 +7 x 2 + 2 x'a 10 ] plssss repede 50 puncte​

Answer 1

Răspuns:

a) a × 14 + 244 = 1000

a × 14 = 1000 - 244

a × 4 = 756

a = 756 : 4

a = 189

b) [ ( a : 9 ) × 7 + ( 102 : 2 ) ] - 49 = 58

( a : 9 ) × 7 + 51 ) = 58 + 49

a : 9 × 7 + 51 = 107

a : 9 × 7 = 107 - 51

a : 9 × 7 = 56

a : 9 = 56 : 7

a : 9 = 8

a = 8 × 9

a = 72

c) 8 × a + 573 : 3 - 93 = 210

8 × a + 573 : 3 = 210 + 93

8 × a + 573 : 3 = 303

8 × a + 191 = 303

8 × a = 303 - 191

8 × a = 112

a = 112 : 8

a = 14