Please help me fast i Elena began to solve this equation:
12x + 6(4x + 3)
= 2(6x + 4-2)
3
12x + 6(4x + 3) = 3(2(6x + 4) - 2)
12x + 6(4x + 2) = 6(6x + 4) - 6
12.x + 24x + 18 = 36x + 24 - 6
When she got to the last line, she stopped and said the equation is true for all values of x (infinite solutions),
low could Elena tell?
A The variable terms and constant terms are different
B. The variable terms are the same, but the constant terms are different
C. The variable terms are different, but the constant terms are the same
D. The variable terms and constant terms are the same

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?