1) minus 4 from both sides
2) x=5
the long explanation...x+4=9
so, you subtract 4 from both sides of the equation...
x+4 -4 = 9 -4
And, that simplifies to
x=5
done! the answer is 5!
h= -4
172=x
A + 9 = 21 A = 21 - 9 A = 12
2*2+4x-9=0 4x=9-4 4x=5 x=5/4
-9-2x+x = -13 -2x+x = -13+9 -x = -4 x = 4
10
4 + 4 +1
h= -4
172=x
x=4 x=0
9=4a+13 9-13=4a -4=4a -4/4=a -1=a a=-1
a=5: c=4
In math problems without punctuation such as brackets, the standard convention in to solve from left to right. Therefore, you would solve the problem 15-3 times 4 plus nine like by three actions. 15-3 equals 12; 12 times 4 equals 48; 48 plus 9 equals 57.
3
2x+1 = 9 2x = 9-1 2x = 8 x = 4
A + 9 = 21 A = 21 - 9 A = 12
2*2+4x-9=0 4x=9-4 4x=5 x=5/4