Here the question is simple. All because, we only need to find the value of x. We are given two equations. 5x + 6 = 10 and 10x + 3 =? So, we will find the the value of x in the first equation, so that we can substitute the value of x in the second one and there we are with the answer. 5x + 6 = 10 For finding the value of x, all we have to do is, Transpose the number 6 to 10 Therefore. 5x = 10 - 6 ( Take the equal sign as The Magic Bridge on which if anyone crosses it , will change its sign.) So we have, 5x = 4 So x = 4/5 ( Multiplication will change to division after crossing the equal sign) ( Doubtful? Substitute the value of x and try!) Now that we got the value of x, We can just simply substitute the value of x in the second equation. 10x + 3 = ? x = 4/5 10*4/5 +3 => 5 and 10 get canceled to 2 at the numerator. By normal multiplication and then addition, we will get, 8 + 3 = 11 Hope this helps!!!! :)
