7x - 8 = 3x + 4
4x - 8 = 4
4x = 12
x = 3
Check it.
21 - 8 = 9 + 4
It checks.
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If ten times the number n decreased by 13 is equal to the square of the same number n increased by 3, then the value of n is either 8 or 2.
3x+32=4x-15 3x-4x=-15-32 x=-47
6n - 3n which simplifies to 3n.
x - 2 = 7 + x/4 4x - 8 = 28 + x 3x = 36 x = 12
x-4=8+x/5 5(x-4)=5(8+x/5) 5x-20=8+x 4x=28 x=7