tolong bantu jawab kak
Jawaban:
2a. x + 7 = 9
b. x1 + 2x2 = 16
3a.
Penjelasan dengan langkah-langkah:
2a. x + 7 = 9
x = 9 - 7
x = 2, selisih 2
b. x1 = panjang alas
x2 = panjang kaki yg sama
3a. 5x + 3 = 23
5x = 23 - 3
5x = 20
x = 20/5
x = 4
b. -2x = 18
x = 18/-2
x = -9
c. 3x = 2x + 18
3x - 2x = 18
x = 18
d. -4a + 6 = -18
-4a = -18-6
-4a = -24
-a = -24/4
-a = -6
a = 6
e. 4b + 6 = b + 24
4b - b = 24 - 6
3b = 18
b = 18/3
b = 6
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