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6 - 42 = 3z
-36 = 3z
-12 = z
2) 3x -10 = x - 4
3x - x = -4 + 10
2x = 6
x = 3
3) 2y + 5 = y
2y - y = -5
y = -5
4) 5p - 7 = 4p + 12
5p - 4p = 12 + 7
p = 19
5) 3x + 8 = 2x + 11
3x - 2x = 11 - 8
x = 3
6) 7p + 8 = 6p + 11
7p - 6p = 11 - 8
p = 3
-3z =42-6
-3z = 36
z = -12
b . 3x-10 = x - 4
3x - x = -4+10
2x = 6
x = 3
c. 2y+5 = y
2y-y = -5
y = -5
d. 5p-7 = 4p +12
5p-4p = 12 + 7
p = 19
e. 3x+8 = 2x+11
3x-2x = 11-8
x = 3
f 7p+8 = 6p+11
7p-6p = 11 - 8
p = 3
teliti lagi ya , maaf kalau ada yg salah