If 5 * 2 = 5x (2 + 2), 6 * 4 = 6x (4 + 2), then 7 * 3 equals ()

If 5 * 2 = 5x (2 + 2), 6 * 4 = 6x (4 + 2), then 7 * 3 equals ()


7*3=7X(3+2)



Solution equation: 5x + 2.5x = 15


5x + 2.5x =15
7.5x=15
x=15/7.5
x=2



Solution equation: 3.5x + 15 = 50


3.5x+15=50
3.5x=50-15
3.5x=35
x=35/3.5
x=10



Solution equation solution equation 0.5x-0.15 = 3 / 4-x


0.5x-0.15 = 3 / 4-x
0.5x-0.15=0.75-x
0.5x+x=0.75+0.15
1.5x=0.9
x=0.9÷1.5
x=0.6