2x-5=49
move -5 to the other side
sign changes from -5 to +5
2x-5+5= 49+5
2x=49+5
2x= 54
divide both sides by 2 to get x by itself
2x/2= 54/2
cross out 2 and 2, divide by 2 and then becomes 1*1*x=x
54/2= x
Answer:
x= 27
Okay so the value of X is 9x^2/7
X: liters of 15% orange juice
y: liters of 10% orange juice
x+y=5L
y=5L - x
x liters of 15% orange juice plus y liters of 10% orange juice makes 5 liters of 12% orange juice in equation form:
0.15x+0.10y = 0.12(5L)
0.15x+0.10(5L-x)=0.12(5L)
0.15x+0.5-0.10x=0.6
0.05x=0.1L
x=2L
so y = 3L
so you need 2 liters of 15% orange juice and 3 liters of 10% orange juice