exam Maths Puzzle Numerical Ability

solve and check the linear equation 6x-7+3(x+1)=4x-6

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exam Other Question

the orderd pair (-2,1) is a solution to the following system:
2x+5y=1
3x-2y=4 1. A parking lot has a perimeter of 600 ft. the width is 30 ft less than the length. find the dimensions of the parking lot.

2. Solve and write in interval notation for the solution set
-5 <_ 2x + 1 < 7