1.a+8=7 2.a-4=10 3.2a+5=21 4.10-a=15
Matematika
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Pertanyaan
1.a+8=7
2.a-4=10
3.2a+5=21
4.10-a=15
2.a-4=10
3.2a+5=21
4.10-a=15
1 Jawaban
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1. Jawaban Ashiela
1) a + 8 = 7
a = 7 - 8
a = -1
2) a - 4 = 10
a = 10 + 4
a = 14
3) 2a + 5 = 21
2a = 21 - 5
2a = 16
a = 16 ÷ 2
a = 8
4) 10 - a = 15
-a = 15 - 10
-a = 5
a = 5 ÷ (-1)
a = -5