1) (4^2 + 3^2) * 5 - 5^3 = (16 + 9) * 5 - 125 = 125 - 125 = 0
2) 21x + 13x - 17x = 187
17x = 187
x = 11
1.
...= (16+9) • 5 - 125 = 25•5-125=125-125=0
2.
...
17х = 187
х = 187 : 17
х = 11
1) (4^2 + 3^2) * 5 - 5^3 = (16 + 9) * 5 - 125 = 125 - 125 = 0
2) 21x + 13x - 17x = 187
17x = 187
x = 11
1.
...= (16+9) • 5 - 125 = 25•5-125=125-125=0
2.
...
17х = 187
х = 187 : 17
х = 11