Hej!
3a + (b - a) = 3a + b - a = 2a + b
(4x - 5) - 4 = 4x - 5 - 4 = 4x - 9
7 + (3x - 5) = 7 + 3x - 5 = 3x + 2
a + (a - b) = a + a - b = 2a - b
2x + (x + 4) = 2x + x + 4 = 3x + 4
2(x + 4) + 2x - 2 = 2x + 8 + 2x - 2 = 4x + 6
5(x - 4) - 2 + x = 5x - 20 - 2 + x = 6x - 22
Pozdrawiam! - Julka
3a+(b-a)=3a+b-a=2a+b
(4x-5)-4=4x-5-4=4x-9
7+(3x-5)=7+3x-5=2+3x
a+(a-b)=a+a-b=2a-b
2x+(x+4)=2x+x+4=3x+4
2(x+4)+2x-2=2x+8+2x-2=4x+6
5(x-4)-2+x=5x-20-2+x=6x-22
Mam nadzieję, że pomogłam!❤