mohon bantuannya untuk perranyaan no 3 dan 4

Kelas 10 Matematika
Bab Logaritma

^ = pangkat

3] ²log (1/32) + 6 . (^7log √7) - ^(1/3)log 81
= ²log 2^(-5) + 6 . (^7log 7^(1/2)) - ^(3^-1)log 3^4
= (-5) . ²log 2 + 1/2 . 6 . ^7log 7 - (4/-1) . ^3log 3
= -5 + 3 + 4
= 2

4] x + 5y = -4
x = -5y - 4

3x - 2y = 5
3 (-5y - 4) - 2y = 5
-15y - 12 - 2y = 5
-17y = 5 + 12
y = 17/-17
y = -1

x = -5y - 4
x = -5 . (-1) - 4
x = 5 - 4
x = 1

4x + 3y
= 4 . 1 + 3 . (-1)
= 4 - 3
= 1