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56\left(3x-8\times 5\right)+560x=1680\left(9\times 8-2x\right)-5\times 112
Multiply both sides of the equation by 280, the least common multiple of 5,56.
56\left(3x-40\right)+560x=1680\left(9\times 8-2x\right)-5\times 112
Multiply 8 and 5 to get 40.
168x-2240+560x=1680\left(9\times 8-2x\right)-5\times 112
Use the distributive property to multiply 56 by 3x-40.
728x-2240=1680\left(9\times 8-2x\right)-5\times 112
Combine 168x and 560x to get 728x.
728x-2240=1680\left(72-2x\right)-5\times 112
Multiply 9 and 8 to get 72.
728x-2240=120960-3360x-5\times 112
Use the distributive property to multiply 1680 by 72-2x.
728x-2240=120960-3360x-560
Multiply -5 and 112 to get -560.
728x-2240=120400-3360x
Subtract 560 from 120960 to get 120400.
728x-2240+3360x=120400
Add 3360x to both sides.
4088x-2240=120400
Combine 728x and 3360x to get 4088x.
4088x=120400+2240
Add 2240 to both sides.
4088x=122640
Add 120400 and 2240 to get 122640.
x=\frac{122640}{4088}
Divide both sides by 4088.
x=30
Divide 122640 by 4088 to get 30.