Answer:
Explanation:
1)
4-3x = 7
-3x = 7-4
-3x = 3
-3x÷(-3) = 3÷(-3)
x = 1
2)
3x-4 = 17
3x = 17+4
3x = 21
3x÷3 = 21 ÷3
x = 7
3)
2x+8 = 40
2x = 40-8
2x = 32
2x÷2 = 32÷2
x = 16
4)
3x+6x+12 = 30
9x+12 = 30
9x = 30-12
9x = 18
9x÷9 = 18÷9
x = 2
5)
3x+4 = 5x-6
5x-3x = 6+4
2x = 10
2x÷2 = 10÷2
x = 5
6)
2x+5 = 4x-3
4x-2x = 5+3
2x = 8
2x÷2 = 8÷2
x = 4
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