Question

vaaaaaaaa rogggggggg urgent căci dacă nu îmi fac tema îmi da i vaaaaaaaa rooooog ex 2 3 4

Answer 1

2. 26+(6×5-7a):9=27
(30-7a):9=1
30-7a=9
7a=21
a=3

3. 5+2×(100+y×4)-124:4=1000-754
5+2×(100+4y)-31=246
2×(100+4y)=246-5+31
2×(100+4y)=272
100+4y=272:2
100+4y=136
4y=136-100
4y=36
y=9

4. z=123×[960:3+13×5-(300+80)]+4
z=123×[320+65-380]+4
z=123×5+4
z=615+4
z=619