Home Matematika Selesaikan dan periksa 3x + 2 (x + 2) = 20 – (2x – 5)

Selesaikan dan periksa 3x + 2 (x + 2) = 20 – (2x – 5)

soal — 05/10/2023 in Matematika • Comments off

Diketahui 3x+2(x+2)=20-(2x-5)

3x + 2(x) + 2(2) = 20 – 2x -(-5)

3x + 2x + 4 = 20 – 2x + 5

3x + 2x + 2x = 20 – 4 + 5

7x = 21

x = 21/7

x=3..

Memeriksa:

3x + 2 (x+2)=20-(2x-5)

substitusi x = 3

3(3) + 2(3+2) = 20 – (2(3) – 5)

9 + 2(5) = 20 -(6-5)

9 + 10 = 20 -(1)

19 = 19..

Jadi x = 3