765, A Twenty-First Century Survivor: A little history and some great stories from Rich Melvi

765, A Twenty-First Century Survivor: A little history and some great stories from Rich Melvi

Matematika Sekolah Menengah Atas × dan y yang memenuhi sistem persamaan linear 4x + 3y = 5 dan x - y = 3 tentukan nilainya

× dan y yang memenuhi sistem persamaan linear 4x + 3y = 5 dan x - y = 3 tentukan nilainya

eliminasi kedua persamaan:

4x+3y = 5 |×1|

x-y = 3 |×4|

4x+3y = 5

4x-4y = 12 _

7y = -7

y = -1

substitusi nilai y:

x-y = 3

x-(-1) = 3

x+1 = 3

x = 2

Jawaban:

X=3+y

4x + 3y=5

4(3+y)+ 3y =5

12+4y+3y=5

7y=5-12

y=-1

X= x=3+y

=3+(-1)

=2

X, Y

2,-1

[answer.2.content]