diketahui 5×+18=2×-3.nilai dari 4×+8 adalah...?

Materi : Linear
Kelas : VII

5x + 18 = 2X - 3
5x - 2x + 18 + 3 = 0
3x + 21 = 0
3x = -21
x = -21/3
x = -7

→ Subsitusi x = -7 ke 4x + 8 :
4x + 8
= 4(-7) + 8
= -28 + 8
= -20

Semoga Membantu...

x = -7

4(-7)+8 = (-28)+8 = -20