Question

Раскройте скобки и упростите
2x+(1+2y)=
3x-(1-(2+x))

Answer 1

2x + 1 + 2y = 2x + 2y + 1

3x - (1 - 2 - x) = 3x - (-1 - x) = 3x + 1 + x = 4x + 1