a. x + 13 = 1
x = 1 - 13
x = -12
b. 5x + 3 = 28
5x = 28 - 3
5x = 25
x = 5
c. 8x - 1 = 7
8x = 7 + 1
8x = 8
x = 1
d. 3x + 5 = -10
3x = -10 - 5
3x = -15
x = -5
x + y = 6
x - y = 2
x = 4
y = 2
pembuktian
4 + 2 = 6 Terbukti
4 - 2 = 2 Terbukti
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Penjelasan dengan langkah-langkah:
a. x + 13 = 1
x = 1 - 13
x = -12
b. 5x + 3 = 28
5x = 28 - 3
5x = 25
x = 5
c. 8x - 1 = 7
8x = 7 + 1
8x = 8
x = 1
d. 3x + 5 = -10
3x = -10 - 5
3x = -15
x = -5
x + y = 6
x - y = 2
x = 4
y = 2
pembuktian
x + y = 6
4 + 2 = 6 Terbukti
x - y = 2
4 - 2 = 2 Terbukti