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If the digit in the thousands place is increased by 1, the value of the number is increased by 1,000.
-1
2x+4
x = number Four times the number (4x) is the same as the number increased by 78 (x + 78). Since they are both equal, then 4x = x + 78 4x - x = 78 3x = 78 x = 26
y = 4x + 6