Ineed to find what ever the missing number is 23+what=-69

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

One integer is 8 times another. if the product is 72, then find the integers

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11