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hilka2
@hilka2
November 2021
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♡♡...........помогите........
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jekadva
Г) скобки не пишу
8x - 15y = -36 */5 40x - 75y = -180
20x + 21y = 144 */2 40x + 42y = 288 -117y = -468 y = 4
8x - 15*4 = -36
8x - 60 = -36
8x = -36 + 60
8x = 24
x = 24 : 8
x = 3
ответ : (3 ; 4)
====================
д)
6m + 5n = 15 6m + 5n = 15
3m - 35n = 120 6m - 70n = 240 75n = -225 n = -3
6m + 5*(-3) = 15
6m - 15 = 15
6m = 30
m = 5
ответ:( 5 ; -3)
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Answers & Comments
8x - 15y = -36 */5 40x - 75y = -180
20x + 21y = 144 */2 40x + 42y = 288 -117y = -468 y = 4
8x - 15*4 = -36
8x - 60 = -36
8x = -36 + 60
8x = 24
x = 24 : 8
x = 3
ответ : (3 ; 4)
====================
д)
6m + 5n = 15 6m + 5n = 15
3m - 35n = 120 6m - 70n = 240 75n = -225 n = -3
6m + 5*(-3) = 15
6m - 15 = 15
6m = 30
m = 5
ответ:( 5 ; -3)