[tex]jika \: \: 3(x + 7) = x - 15 \\ nilai \: \: 4x - 2 \:adalah[/tex]
Matematika
miftahuljannah1711
Pertanyaan
[tex]jika \: \: 3(x + 7) = x - 15 \\ nilai \: \: 4x - 2 \:adalah[/tex]
2 Jawaban
-
1. Jawaban ika1083
[tex]3(x + 7) = x - 15 \\ 3x + 21 = x - 15 \\ 3x - x = - 15 - 21 \\ 2x = - 36 \\ x = \frac{ - 36}{2} \\ x = - 18[/tex]
maka
[tex]4x - 2 = 4(18) - 2 = 72 - 2 = 70[/tex] -
2. Jawaban brainstorm22
3 (x+7) = x-15
3x+21 = x-15
3x-x = -15-21
2x = -36
x=-36/2
x = -18
4x - 2
= 4 . -18 -2
= -72 -2
= -74