Solve for x
x\geq 0
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42x-28\geq 6x-28
Use the distributive property to multiply 7 by 6x-4.
42x-28-6x\geq -28
Subtract 6x from both sides.
36x-28\geq -28
Combine 42x and -6x to get 36x.
36x\geq -28+28
Add 28 to both sides.
36x\geq 0
Add -28 and 28 to get 0.
x\geq 0
Product of two numbers is ≥0 if both are ≥0 or both are ≤0. Since 36\geq 0, x must be ≥0.
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