2×(2×) - (6-7×) = 13× - (1+4×)
2x2x-6+7x=13x -1 -4x
4x-6+7x=9x -1
11x -9x = -1+6
2×=5
x= 5/2
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2×(2×) - (6-7×) = 13× - (1+4×)
2x2x-6+7x=13x -1 -4x
4x-6+7x=9x -1
11x -9x = -1+6
2×=5
x= 5/2