Question

Tentukan penyelesaian dari persamaan berikut!
1. 3 (×+2)+5 = 2 (×+15)
2. 2× + 5 = 11
3. 3× - 4 = 32 + 7×
4. 1/5× + 2/5× = 10

bantiuin yaah,, plis

Answer 1

1. 3 (×+2)+5 = 2 (×+15)
3x+6+5=2x+30
3x-2x=30-6-5
x=19

2. 2× + 5 = 11
2x=11-5
2x=6
x=6/2
x=3

3. 3× - 4 = 32 + 7×
3x-7x=32+4
-4x=36
x=-36/4
x=-9

4. 1/5× + 2/5× = 10
3x/5=10
dikali silang
3x=50
x=50/3
x=16,66 (kalau salah mohon dikoreksi)

Answer 2

1. 3(x+2)+5 = 2(x+15)
3x+6+5 = 2x+30
3x+11= 2x+30
3x-2x= 30-11
x = 19
2. 2x+5=11
2x=11-5
x=6/2
x= 3

3. 3x-4=32+7x
3x-7x=32+4
-4x = 36
x= 36/-4
x= -9

4. 1/5x + 2/5x =10
3/5x = 10
3 = 10 × 5x
3 = 50x
x = 3/50
mohon maaf jika ada yg salah. saya hanya sekedar mengingat pelajarn smp ☺