For what value of b do the lines bx+3y=10 and x–2y=4 intersect at a point on the x-axis?

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How do i put 3(x+7) in distributive property

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?