tolong jawab nomer 7 sama 3 please (: hari ini di kumpulin jam 7

3. 7p+3 = 4p-9
7p-4p = -9-3
3p = -12
p = -12/3
p = -4

2p + 10 = 2x(-4) +10
= -8+10
= 2


7. 4x-20+x+10 = 180
5x-10=180
5x = 190
x= 190/5
x= 38

4x-20 = 4x(38) -20
= 132