How do you solve this question algebraically?
y=x+5 if y=3x

Substitutionsub in 3x for y in the other equation

y = x + 5
3x = x + 5
3x - x = 5
2x = 5
x = 5/2

now sub 5/2 in for x in either of the original equations to find y
y = 3x
y = 3(5/2)
y = 15/2

solution is (5/2, 15/2)

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.